You can use the data you have collected to calculate the average daily return for Eastern Mining Corp. over the last 120 days.
To calculate the average daily return, you will need to sum all of the daily returns and then divide by the total number of days in the sample (120 in this case). You can then use this average daily return to make predictions about the future performance of the company's stock.
The average daily return is a measure of the average gain or loss of a stock or other financial instrument over a period of time, usually expressed as a percentage. It is calculated by adding up all of the individual daily returns for a given period and then dividing by the total number of days in the period. The average daily return can be used to compare the performance of different stocks or financial instruments, or to assess the risk of investing in a particular stock or instrument.
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Which step in photosynthesis does not need light? (1 point)
O Carbon dioxide and hydrogen combine to make glucose.
Water splits into hydrogen and oxygen.
Chlorophyll absorbs energy.
O Oxygen is released.
Answer:
The fourth step in photosynthesis, known as the Calvin cycle, does not require light.
Explanation:
Cross a homozygous dominant fruit with a heterozygous fruit. What percentage of their offspring will have yellow fruit?
Answer: 25% of their offspring will have yellow fruit
Explanation:
according to carl rogers, anxiety and neurotic behaviors occur when . a person has low self-esteem there is matching between the real self and ideal self there is a discrepancy between the real self and ideal self the individual receives too much unconditional positive regard
Carl Rogers has given some theories of personality where he suggests that anxiety and neurotic behaviour are the results of mismatches between the real and ideal self.
The self-concept has two divisions - the real self and the ideal self. The real self refers to a person’s actual living conditions, both mental and physical. The ideal conditions are what a person wishes to have in his or her life.
The wide differences in the real and ideal self results in neurotic behaviour and anxiety. This often happens when a person sets his ambitions high and is not able to achieve them.
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When there is a discrepancy between the real self and the ideal self, it leads to anxiety and neurotic behaviors.
A person's personality is basically their representation and in this regard there are various self forms present in every individual. The real self is the one that reflects a particular individual's true qualities, their aptitudes, inclinations as well as characteristics.
Ideal self of an individual is constituted by the characteristics which that particular individual aspires to gain. It can be said that it is basically the guide of the self. Whenever there is a discrepancy or a major difference in an individual's real and perceived or ideal self, it leads to anxiety as well as neurotic behaviors.
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If a mutation occurs in the hypoblast cells of a bilaminar embryo, one might expect birth defects to be present in the..
If a mutation occurs in the hypoblast cells of a bilaminar embryo, one might expect birth defects to be present in embryonic and fetal development.
Specifically in the formation of the embryonic and fetal layers, such as the endoderm and the mesoderm. These layers give rise to many of the body's structures including the organs, muscles, and bones.
Therefore, it may lead to congenital malformations, which can affect multiple organ systems and cause significant health problems. It could also have a large impact on the development and function of the gut.
The formation of the neural crest cells gives rise to many different cell types including neurons and glia, as well as bones, cartilage, and pigment cells.
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the subfield within biological anthropology that is most likely to study population events that explain the observed genetic patterns in a population is
The subfield within biological anthropology that is most likely to study population events that explain the observed genetic patterns in a population is population genetics.
Population genetics is the study of genetic variation and evolution within populations. This subfield uses the principles of genetics and evolution to understand how genetic patterns is distributed within and among populations and how it changes over time. Population genetics is concerned with understanding the genetic makeup of populations, how genetic variation is generated, how it is maintained, and how it is passed down from one generation to the next. It also looks at how population size, migration, and natural selection genetic patterns of genetic variation. By studying population events, population genetics can help to explain the observed genetic patterns in a population, such as genetic drift, natural selection, gene flow, and mutation, and how they contribute to population evolution.
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Which of the following observations and inferences led Charles Darwin to his theory of natural selection as a mechanism for evolution?
A
Individuals in a population of any species vary in many heritable traits.
B
Individuals with heritable traits best suited to the local environment will generally produce a disproportionate number of healthy, fertile offspring.
C
A population of any species has the potential to produce far more offspring than will survive to produce offspring of their own.
D
Darwin synthesized his theory of natural selection from all of the listed observations and inferences.
Charles Darwin developed his hypothesis on natural selection as just a process for evolution by combining all of the data and inferences stated above.
Darwin deduced the following conclusions from the following two observations: Although organisms are capable of producing enormous numbers of children, most of these children do not survive, therefore a population's members differ in their heritable features. Darwin's theories on natural selection were shaped by his journey to the Galápagos in 1835. He discovered multiple bird species that were adapted to various environmental niches. The beak shapes, food sources, and methods of food capture varied among the finches as well. Darwin draws two conclusions from just two data points; Population members' inherited features vary among them, according to observation 1. Observation 2: All species have the capacity to have more children than the ecosystem can support, yet a large proportion of these young do not survive and procreate. Various observations regarding the hypothesis of natural selection were made.
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Darwin synthesized his theory of natural selection from all the above observations and hypotheses These observations and hypotheses led Charles Darwin to his theory of natural selection as a mechanism of evolution. Here option D is the correct answer.
Charles Darwin developed his theory of natural selection by synthesizing various observations and hypotheses he made during his travels on the HMS Beagle and through his study of the natural world.
He proposed that natural selection is the mechanism by which species evolve over time through the process of adaptation to their environment.
Darwin's theory of natural selection proposes that within a population of organisms, there is variation in traits. These variations can be inherited by offspring. Those organisms with traits better suited to their environment are more likely to survive and reproduce, passing on their advantageous traits to their offspring.
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5 reasons of why we do collect biological specimen
Scientists often require keeping a stock of biological collections because it is not possible for a scientist to every time go out and get a sample.
What are the requirements of scientist?Scientists may be require which is comparing the several of his biological subjects that might be or not always be found in the area, so it has the important to keep the collection.
It just depends on the type as well as the size of the organism in question. Certain organisms like the butterfly would not be available in the area where the lab has been located.
Therefore, Scientists often require keeping a stock of biological collections because it is not possible for a scientist to every time go out and get a sample.
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a cell is made using zinc and copper. when this cell is made, which element will be reduced? (the values provided were taken off a reduction potential table)
Answer:
Explanation:Zinc and copper are used to create a cell. Which element will be diminished when this cell is created? (The figures given were obtained from a chart of reduction potential)
The copper electrode to the zinc electrode is where the Daniel cell current travels. It produces an emf of 1.1V when operating in normal conditions. Current travels from the Cu electrode to the Zn electrode as electrons move from the Zn rod to the Cu rod. Copper accumulates at the cathode while zinc dissolves at the anode.
High dosages of zinc can result in a copper deficiency since it decreases the amount of copper your body absorbs. Because of this, many medical professionals advise that you take a zinc supplement and 2 milligrams of copper daily.
Which is one function of steroids?
waterproofing leaves and feathers
insulating and protecting bones and organs
serving as chemical messengers
providing energy storage
One of the functions of steroids is that they serve as chemical messengers. That is option C.
What are chemical messengers?Chemical messengers is defined as the components of the body of a living organism known also as hormones which are responsible for the transfer of information from one cell to another.
There are different forms of hormones such as listed below:
lipid-derived (steroid), amino acid-derived, andpeptide.Examples of chemical messengers which are lipid-derived (steroids) are the testosterone and estrogen.
Therefore, steroid hormones can serve as chemical messengers in the body.
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a central focus of research at the body farm concerns decomposition, which is mainly comprised of two processes: autolysis and putrefaction. identify which of the following are characteristics of autolysis, putrefaction, or both.
Decomposition is the first step in the process of recycling nutrients used by an organism (plant or animal) to build its body.
It is the process through which dead tissues break down and transform into more fundamental organic forms. These serve as a major source of food for many of the species that make up ecosystem bases. The species that carry out the process of decomposition are called detritivores.
The direct translation of the word "detritivore" is "feeds on dead or decaying organic things." Numerous species of decomposers and cooperate or operate apart from one another. Each is responsible for a certain phase of the breakdown process to autolysis and putrefaction. Because the corpse lacks moisture, the first stage of postmortem decomposition is called initial decay.
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if a water quality expert were to check the level of dissolved oxygen in the lake water, s/he would find that it ___.
if a water quality expert were to check the level of dissolved oxygen in the lake water, s/he would find that it varies.
The level of dissolved oxygen in lake water can be influenced by a variety of factors such as temperature, water flow, and the presence of pollutants or excess nutrients. In general, colder water can hold more dissolved oxygen than warmer water, and well-oxygenated water typically has a higher dissolved oxygen content than poorly-oxygenated water. Additionally, the presence of pollutants or excess nutrients can lead to an overgrowth of algae and other aquatic plants, which can deplete the dissolved oxygen levels in the water. Therefore, it is important for a water quality expert to conduct regular monitoring of dissolved oxygen levels to ensure that the lake water is healthy for aquatic life.
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retroviruses such as hiv hiv and hepatitis b b virus use rna rna as their genetic material rather than dna dna . in addition, they contain molecules of reverse transcriptase, an enzyme that uses an rna rna template to synthesize complementary dna dna . which of the following best predicts what will happen when a normal cell is exposed to a retrovirus?
The best predictions in this are that when a normal cell is exposed to a retrovirus, the reverse transcriptase will make DNA from the viral RNA, which can be incorporated into the host's genome and subsequently transcribed and translated.
A specific kind of virus that uses RNA as its genetic material rather than DNA. Reverse transcriptase is an enzyme that is used to integrate into the DNA of the host cells. This enables the virus to replicate often in the host cells. Human immunodeficiency virus (HIV), which causes AIDS, is a class of retrovirus.
Retroviruses, including the HIV and hepatitis B viruses, have RNA rather than DNA in their genetic makeup. Reverse transcriptase molecules are also present in them.
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Correct Question:
Retroviruses such as HIV and hepatitis B virus use RNA as their genetic material rather than DNA. In addition, they contain molecules of reverse transcriptase, an enzyme that uses an RNA template to synthesize complementary DNA. what will be the best predicts and what will happen when a normal cell is exposed to a retrovirus?
When a normal cell is exposed to a retrovirus such as HIV or hepatitis B virus, the virus will enter the cell and use reverse transcriptase to convert its RNA into a complementary DNA form.
This DNA can then integrate into the host cell's genome and become a permanent part of the cell's genetic material. The best predictors of a retroviral infection are exposure to the virus and the presence of viral genetic material or antibodies in the blood. This is because retroviruses can persist in the body for long periods of time, even if the person does not show any symptoms of illness. Once a retrovirus has integrated its genetic material into the host cell's genome, it can alter the normal functioning of the cell and potentially cause disease. For example, in the case of HIV, the virus attacks and destroys immune cells, leading to a weakened immune system and the development of acquired immunodeficiency syndrome (AIDS). Similarly, in the case of hepatitis B virus, the virus can cause liver damage and lead to the development of liver disease. In conclusion, the integration of retroviral genetic material into the host cell's genome is a critical step in the development of retroviral infections and diseases. The presence of viral genetic material or antibodies in the blood is the best predictor of a retroviral infection, and exposure to the virus is a risk factor for the development of retroviral illness.
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The complete question is :
Retroviruses such as HIV and hepatitis B virus use RNA as their genetic material rather than DNA. In addition, they contain molecules of reverse transcriptase, an enzyme that uses an RNA template to synthesize complementary DNA. what will be the best predicts and what will happen when a normal cell is exposed to a retrovirus?
Which of the following statements describe properties of the DNA molecule that are consistent with Chargaff's data?
answer choices
O two adenine bases on opposite strands can form hydrogen bonds between each other
O on a single strand, the four bases are repeated many times in different combinations
O on a single strand, the four bases are repeated many times but are always grouped in the same order
O hydrogen bonds between opposite strands are stronger than covalent bonds; if broken, this will cause permanent damage to the organism
The statement that describes properties of the DNA molecule that are consistent with Chargaff's data is on a single strand, the four bases are repeated many times and in different combinations.
Thus, the correct option is B.
Chаrgаff's rules stаte thаt in the DNА of аny species аnd аny orgаnism, the аmount of guаnine should be equаl to the аmount of cytosine аnd the аmount of аdenine should be equаl to the аmount of thymine. Further а 1:1 stoichiometric rаtio of purine аnd pyrimidine bаses (i.e., А + G = T + C) should exist. This pаttern is found in both strаnds of the DNА. They were discovered by Аustriаn-born chemist Erwin Chаrgаff in the lаte 1940s.
Based on Chargaff's data (look at the Attachment), the DNA molecule is on a single strand, and the four bases are repeated many times and in different combinations.
Your question is incomplete, but most probably your complete question can see in the Attachment.
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Use the following simple predator-prey relationships to answer the other interactions exist in this system): Mice question (assume no mice are consumed cat grain grown by farmer before it can be harvested The by several species of snakes, which themselves are consumed by hawks population of snakes were suddenly wiped out by disease, the explain the mice; and hawk populations, and long- tem effects on the grain_ why these effects would be observed.
In this predator-prey system, mice are prey for various snake species, which are then eaten by hawks. If snakes were suddenly wiped out by illness, the mouse population.
would most likely expand since there would be fewer predators to keep them in check. As a result, the hawk population is expected to decline since there will be less food available for them to devour. In terms of the farmer's grain, the long-term consequences are anticipated to be good. With more mice, there would be greater predation on the grain and less agricultural damage. However, it is worth mentioning that a rise in mouse population might be troublesome for farmers, who may need to take precautionary steps.consumed cat grain grown by farmer before it can be harvested The by several species of snakes, which themselves are consumed by hawks population of snakes were suddenly wiped out by disease, the explain the mice; and hawk populations, and long- tem effects on the grain.
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This chart shows the sequence of a particular gene in three different organisms. Which two organisms do you think are most closely related? Explain your answer. ORGANISM GENE SEQUENCE Organism A TCAGGAACTA Organism B ACAGGAAGTA Organism C TGTAAGTATA
Organism A and Organism B are most likely the most closely related organisms as they share the most similar gene sequences.
What is Gene?gene is found in a particular organism. It is a sequence of nucleotides that makes up a particular gene, which determines the characteristics of that organism. It is a part of the organism's genome and is responsible for the expression of a particular trait or characteristics.A gene is the fundamental structural and functional component of heredity. The DNA that makes up genes. In some cases, genes serve as blueprints for the creation of proteins. In contrast, a large number of genes do not encode proteins. A few hundred DNA bases to more than 2 million bases make up the majority of human genes.To Learn more about Gene from the given link
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dr. carl woese is credited as being the first scientist to compare the nucleotide sequences of genes coding for rrna to discern phylogeny.
It's true that Dr. Carl Woese is credited with being the first scientist to compare the nucleotide sequences of rRNA-coding genes to distinguish phylogenies.
Woese discovered a revolutionary new genetic technique for studying the evolutionary history of cells. He studied ribosomal RNA (rRNA). Ribosomal RNA is found in all organisms. It is a simpler molecule than DNA. Woese believes that rRNA may be one of the oldest nucleic acids. Woese examined the genes of several organisms.
In 1977, Woese published work demonstrating that methane-producing microbes were not bacteria, but belonged to an entirely new, third world of life. Woese called this third region Archaea (pronounced ar-KEY-a), meaning ancient.
Woese drew a new tree of life, emphasizing a fundamental evolutionary division between three regions: Bacteria, Archaea and Eucarya.
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Describe the human respiratory system and its functions
The respiratory system is a network of organs to help you breathe
The main function is to supply the blood with oxygen in order for the blood to deliver oxygen for all parts within the body. When we breathe, we inhale oxygen and exhale carbon dioxide.
Both in Unit 1 and in Snelgrove’s talk, emphasis is placed on the importance and massiveness of the world’s oceans. Identify some of the facts from both the unit and the video that support this claim.
During his talk, Snelgrove comments that we know more about the Moon or Mars than we do about the deep-sea floor and marine habitat as a whole. Why is this surprising and even ironic?
Snelgrove describes a fishing disaster that occurred where he grew up in Canada in an effort to explain how we are now experiencing “shifting baselines.” Explain what he means by this term.
According to Snelgrove, if you were to suck all of the water out of the ocean, what would you be left with?
Describe what Snelgrove discusses in terms of how the oceans play a part in global collaboration.
Discuss the concerns Snelgrove has regarding the health and safety of our oceans and ocean life.
As he concludes his talk, Snelgrove says, “And as the oceans go, so shall we.” Explain what he means by this statement.
Answer:is try ur hardest
Explanation:is try ur hardest
. An experiment studies the effects of an experimental drug on the number of offspring a mother mouse has. 10 female mice are given the drug and then impregnated. The number of mice in their litters is compared to the litters of mice that did not take the drug. Based on the data, what would you conclude about the drug, explain if it worked or not and give your reasoning.?
I would conclude that the drug did not work because although the data do not look the same, they average in the same way.
What is an experiment?An experiment is described as a procedure carried out to support or refute a hypothesis, or determine the efficacy or likelihood of something previously untried.
Since the experiment studies the effects of an experimental drug on the number of offspring a mother mouse has, the number of mice in their litters is compared to the litters of mice that did not take the drug should way different average values.
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Use the drop-down menus to identify whether the phrase describes asexual or sexual reproductionfour daughter cellstwo daughter cellsmeiosis mitosis genetic variation identical DNA fertilization
Use the drop-down menus to identify whether the phrase describes asexual or sexual reproduction four daughter cellstwo daughter cellsmeiosis mitosis genetic variation identical DNA fertilization
The process of reproduction in cells that does not involve joining gametes that is known as asexual reproduction. The process of joining gametes that is an egg cell and a sperm cell for reproduction is known as sexual reproduction.
The phrase of sexual reproduction four daughter cells based on genetic variation identical DNA fertilization is to produce gametes, or sex cells. When a parent cell splits into two identical daughter cells of the same size it occurs the process of binary fission. Two daughter cells is asexual reproduction in which they include binary fission, fragmentation, and budding.
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It's complete question is:
Use the drop-down menus to identify whether the phrase describes asexual or sexual reproduction.
four daughter cells - sexual
two daughter cells - asexual
meiosis - sexual
mitosis - asexual
genetic variation - sexual
identical DNA - asexual
fertilization - sexual
true/false. vedatuglucose reacts with oxygen to release energy in the human body. during breathing, oxygen is reduced by donating an electron to hydrogen. in this process, glucose is oxidized and carbon dioxide and water are produced.
The statement is true. In the human body, vedatuglucose and oxygen interact to release energy through the oxidation of glucose.
The oxidation of the glucose results in the production of carbon dioxide and water.
Since energy is produced by the reaction of glucose and oxygen, this process is an oxidation reaction. It is an exothermic reaction and this process releases energy. To produce energy, the human body oxidizes glucose. As a result, the oxygen-based reaction is known as a "oxidation reaction."
Energy being released in the respiratory system is a sign that the event is exothermic. When we consume, food degrades and creates glucose. Energy is created in the human body when oxygen and glucose interact.
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Based on the picture of the map, why does Buenos Aries have a higher ocean surface temperature than Cape Town even though they have the same latitude?
Based on the picture of the map, why does Buenos Aries have a higher ocean surface temperature than Cape Town even though they have the same latitude because energy is transferred from the air to the ocean.
What is Temperature?This is referred to as the degree of hotness or coldness of a substance and it is influenced by thermal energy with the S.I unit being Kelvin.
According to the map we can deduce that Buenos Aries and Cape town are on the same latitude but the former has a higher ocean surface temperature because energy is transferred from the air to the ocean which is why it was chosen as the correct choice.
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With which of these conditions or procedures may there be an increased number of megakaryocytes in the bone marrow, but a decreased number of circulating platelets?
A. Folic acid deficiency
B. Aplastic anemia
C. Radiation therapy
D. Massive blood transfusion
Megakaryocytes become so enormous in light of the fact that the DNA inside the phone copies ordinarily — however without the phone going through cell division: a cycle called endomitosis.
Lack of nutrients like B12 and folic corrosive inadequacy. Diminished THPO creation because of liver brokenness. Blood malignant growths or strong organ diseases with metastasis deep down. Chemotherapy and radiation treatment are used to treat blood malignant growths or metastatic disease.
Hematopoietic Development Variables Invigorate the Arrangement of White Platelets. Thrombopoietin (TPO) is a 332 amino corrosive glycoprotein made fundamentally in the liver that invigorates the development of megakaryocytes from CFU-Meg (settlement shaping unit, megakaryocyte).
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These conditions or procedures may there be an increased number of megakaryocytes in the bone marrow, but a decreased number of circulating platelets (A). Folic acid deficiency is correct option.
A folic acid deficiency may cause a rise in megakaryocytes in blood cells but a decrease in moving platelets. The results of enlarged megakaryocytes and considerably decreased platelet synthesis in the marrow prior to splenectomy as well as the surprising increase in platelet production after splenectomy suggest a definite pathogenetic relationship between the spleen and the sickness. Pancytopenia is usually accompanied by megaloblastic anemias brought on by biotin or vitamin B12 deficiency. Thrombocytopenia's is ineffective. There will be normal or even higher megakaryocyte counts in the marrow, but fewer neutrophils will be able to reach the venous return.
Aplastic anemia has fewer megakaryocytes in the bone marrow, which reduces the number of platelets in circulation.
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According to the accompanying figure, which of the following explains why the red panda is an important species to preserve?A) Red pandas are a symbol of conservation efforts.B) Red pandas live in areas that are critically endangered.C) Seals are more important to preserve than the red panda because the ocean environment is critically endangered.D) Phylogenetically distinct species are high-priority species to target for conservation.
The statement regarding the red panda according to the attached image is a phylogenetically distinct species is a high-priority species to be targeted for conservation.
The correct answer is D.
In the phylogenic picture, only the red panda has no expansion at the ends, which means that the red panda species is threatened with extinction. So, the red panda is important to be preserved.
In contrast to other animal species, the end of the branch has an expansion, meaning that the species represent more than one species. As weasels, badgers, and branch-tip otters expand, populations of these animals do not yet need to be conserved.
This question is accompanied by an image.
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Which country might
have an age-structure
pyramid (showing
declining growth) that
looks similar to the
one shown?
The correct option A. Italy, may have a pyramidal age model similar to that depicted in the figure (with diminishing growth).
Explain the term age-structure pyramid?Population pyramid: a visual representation of a population's age and sex distribution.
The final shape of such a population pyramid is determined by the age and sex composition of the population; as a result, the representation may resemble a pyramid, be columnar, or have an erratic profile.Additional aspects of a population, including marital status, ethnicity, or geography, can be represented by the population pyramid. In this instance, more categories are represented by further subdividing the bars for each age-sex group.A broad-based pyramid shows that younger age groups make up a disproportionately big fraction of the population.Whereas one with a narrow or pointed top shows that older age groups make up a disproportionately small portion of the population.Thus, Italy, may have a pyramidal age model similar to that depicted in the figure (with diminishing growth).
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of the following types of energy, which is/are classified as potential energy? chemical energy electrostatic energy gravitational energy
Answer: all of them are classified potential energy
Explanation:
im just smart
Identical twins separated at birth and raised in completely different home environments would be most likely to have similar:
a. religious beliefs.
b. political attitudes.
c. personality traits.
d. moral values.
Identical twins separated at birth and raised in completely different environments are most likely to have the following characteristics: personal trait
A trait is a characteristic or feature of an individual that can be used to describe or distinguish them, such as a personality trait, physical trait, or behavioral trait.
A twin is one of a pair of siblings who are born at the same time and share the same genetic makeup. There are several types of twins including identical twins, who are genetically identical and develop from a single fertilized egg, and fraternal twins, who develop from two separate eggs that are fertilized by different sperm.
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the gallbladder is a mixed organ, containing both endocrine and exocrine tissues. stores and concentrates bile. lies adjacent to the inferior vena cava on the superior surface of the liver. is surrounded and protected by the round ligament. is attached to the liver by the falciform ligament.
The correct answer is stores and concentrates bile. The gallbladder stones and concentrates corrosiveness from the liver.
The corrosiveness is also released into the first section of the small intestine( the duodenum), which helps your body break down and absorb fats from food. About 50 of the corrosiveness produced by the liver is first stored in the gallbladder.
This is a pear-shaped organ located directly below the liver. Also, when food is eaten, the gallbladder contracts and releases stored corrosiveness into the duodenum to help break down the fats. Corrosiveness is a fluid made and released by the liver and stored in the gallbladder. Corrosiveness helps with digestion. It breaks down fats into adipose acids, which can be taken into the body by the digestive tract.
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the open ocean is responsible for a large amount of the earth's net primary productivity (npp) because it contains vast expanses of phytoplankton, which are microscopic photosynthetic organisms that form the base of the oceanic food web. phytoplankton are responsible for a significant portion of the earth's npp because they are able to use sunlight and dissolved nutrients to produce organic matter through photosynthesis. additionally, the vastness of the open ocean allows for larger populations of phytoplankton to exist and thus produce more organic matter.
The open ocean contributes because of its enormous population of phytoplankton, which can produce organic matter through photosynthesis using sunlight and dissolved nutrients. So, all the given statements are correct.
Since there are more phytoplankton due to the size of the ocean, NPP is higher. Phytoplankton make up a sizable portion of the Earth's NPP because they utilise light and dissolved nutrients to create organic matter through photosynthesis. Additionally, because of the open ocean's size, there are larger populations of phytoplankton, which increases the production of organic matter. The primary producers of the ocean are phytoplankton, which use photosynthesis to create enormous amounts of organic matter. The marine ecology as a whole and the maritime food web are both supported by them. Additionally, phytoplankton is crucial to the global carbon cycle because it absorbs a significant amount of carbon dioxide through photosynthesis, which mitigates the effect of greenhouse gases.
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Choose all correct statements regarding to Phytoplankton
1) The open ocean is responsible for a large amount of the earth's net primary productivity (NPP) because it contains vast expanses of phytoplankton, which are microscopic photosynthetic organisms that form the base of the oceanic food web.
2) Phytoplankton are responsible for a significant portion of the earth's NPP because they are able to use sunlight and dissolved nutrients to produce organic matter through photosynthesis.
3) The vastness of the open ocean allows for larger populations of phytoplankton to exist and thus produce more organic matter.
Chemists have determined that elements with atomic numbers greater than 92 are all
radioactive. In general, their half-lives are much shorter than the age of the universe. This
means that they no longer exist in nature and have all been artificially produced by
scientists in nuclear reactions.
Elements 93 through 105 in the periodic table have been created and named, and
scientists have claimed discovery of elements 106 and 107. The transuranium elements,
as they are called, become less stable as the atomic number and mass increase. For
example, element number 93, neptunium, has a half-life of two million years, while
element number 104, kurchatovium, has a half-life of 70 seconds.
The transuranium elements are the heaviest elements that exist and are readily
fissionable when subjected to nuclear bombardment. Chemists studying these elements
and the periodic table predict that stable elements may be found around atomic numbers
114 or 126.
According to the passage, what can we predict about the half-life of element number 105?
It is:
O
A. greater than 2 million years
B. incalculable (not capable of being determined)
C. measured in days or weeks
D. greater than the other transuranium elements
E. less than 70 seconds
Answer:
B. incalculable (not capable of being determined)
Explanation:
The passage states that elements with atomic numbers greater than 92 are all radioactive and that their half-lives are much shorter than the age of the universe. It also states that elements 93 through 105 in the periodic table have been created and named, but it does not provide any information about the half-life of element number 105 specifically, therefore it is incalculable.