Answer:
Snow melting
Explanation:
The solid snow is the primary substance while the melted snow-water is secondary.
Which gas is a major contributor to ocean acidification? A. oxygen B. sulfur dioxide C. carbon dioxide D. nitrogen
Answer:C, carbon dioxide.
Explanation:Carbon Dioxide reacts with water forming Carbonic acid. This acid increases the acidity of the ocean.
Answer:
Explanation: got it correct
Explain why detritivores, decomposers and omnivores are not assigned trophic level
Answer:
They can be found in several trophic levels, as they are related with several trophic level, hence, they cannot be placed on a specific trophic level.
Explanation:
A trophic level is a specific position occupied by a group of organisms on a good chain in relation to their nutrition.
Dentrivores feed on the waste of other organisms and cannot be really placed on a specific trophic level, likewise decomposers, of which they feed and decompose the body of organisms.
Omnivores feed on both plants and animals, which includes producers and consumers. Placing omnivores on a specific trophic level would not be really straightforward also.
What is the basic unit of structure and function of all living organisms?
mitochondrion
DNA
nucleus
cell
answer:
the answer is d. (cells)
what is a animal and what types of animals are there
Answer:
Animals are multicellular eukaryotic organisms that form the biological kingdom of Animalia. With few exceptions, animals consume organic material, breathe oxygen, are able to move, can reproduce sexually, and grow from a hollow sphere of cells, the blastula, during embryonic development.
Explanation:
Scientists have recently estimated that there are approximately 8.7 million species on Earth. They believe that 1-2 million of those species are animals.
Why would damage to the nervous tissue in the spinal cord lead to paralysis?
Damage results in the loss of signals to muscles to produce movement.
Damage results in the inability of the body to differentiate between voluntary and involuntary movement.
Damage results in the inability of the body to produce connective tissue to support movement.
Damage results in the decreased production of actin and myosin for contraction
Answer:
B. Damage results in the inability of the body to differentiate between voluntary and involuntary movement
Explanation:
Answer:
b
Explanation:
-Lab-
"Why are cells so small"
Answer:
Explanation:
Because we need a lot of cells and if they were big only a small about would fit.
Dermis _____ system is responsible for thermoregulation and for development of inflammatory skin processes
Answer:
Integumentary system
Explanation:
This system is responsible for development of skin, hair, nails, glands, and nerves and it serves as a protector. There are many organs in this system too.
5 Points
Great Britain would have a much colder climate than it does if not for the
O A. polar easterlies
B. gulf stream
C. trade winds
D. jet stream
SUBMIT
Hello There!
Answer:
B. Gulf stream
Explanation:
Great Britain would have a much colder climate than it does if not for the gulf stream.
who is Charles darwin
Answer:
Charles Darwin came up with the theory of evolution.
Charles Darwin is a writer who wrote the book Orgin of species . He is the one that gave the idea of evolution . his proposition that all species of life have decended over time from common ancestors. He is a english naturalist, geologist and biologist
Which of these statements best explains why the rainfall in volcanic regions increases after a volcanic eruption?
The volcano releases particles which help form water droplets.
The volcano releases heat causing clouds to form.
The molten lava from the volcano helps form water droplets.
The increase in fertility of soil around the volcano helps produce rain.
Answer:
The volcano help releases particles which help rain to fall.
Explanation:
Volcano is a form of opening in the Earth crust that make particles that are warmer in it surronding such as magma, hot lava, volcanic ashes to escape from beneath it. Volcano happen as a result of magma rising above Earth surface making the bubbles to spring forth. There is rain, lightning and thunder during volcanic eruptions.
Rainfall near a volcanic region increases after volcanic eruptions because all the ash particles that rises to the atmosphere attract and collect water droplets, thereby causing abundant of rainfall wen the water droplets are released.
The ___ cycle is not a nutrient cycle.
Answer:
water cycle
Explanation:
10. In the water cycle, liquid changes to gas by
O precipitation
O condensation
evaporation
O freezing
Answer:
evaporation
Explanation:
when the liquid heated for a long time it removes steam in form of gases
In the water cycle, liquid changes to gas by evaporation, which is in Option C. The water cycle, also known as the hydrological cycle, describes how water circulates through the Earth's ecosystems.
What is the water cycle?The water cycle involves a series of processes that include evaporation, condensation, precipitation, and infiltration. Evaporation is the process by which water changes from a liquid state to a gaseous state, such as water vapor. This occurs when energy (in the form of heat) is absorbed by the water, causing the water molecules to move faster and break free from their bonds to form a gas. After water evaporates, it can undergo condensation, which is the process by which water vapor changes back into liquid water.
Hence, in the water cycle, liquid changes to gas by evaporation, which is Option C.
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"Rank the sequence of cross bridge cycling, starting with the myosin-binding sites being exposed and ending with relaxation due to cross bridge cycling ending. Do not overlap any events."
Sequence:
a. Calcium ions pumped into the sarcoplasmic reticulum
b. Myosin head forms cross bridge with actin
c. Myosin binding sites covered
d. Power stroke moves thin filament
e. Cross bridges detach from actin
f. Myosin head is re-energized
g. Calcium ion concentration decreases below the threshold for binding to troponin
h. ATP attaches to myosin head
Answer:
Explanation:
This is the process of muscle contraction and relaxation in the muscle. The type of muscle involved is the skeleton muscle.
The process is initiated in the Central nervous system. Examples are in contraction of biceps and triceps.
It involves myosin head and actin filament coupled with the release of calcium ion from the sarcoplasm reticulum: this ion activates this process in the muscles. With the exposure of the music binding site on the acting filament, myosin is able to bind to acting filament bringing about this process.
a. ATP attaches to myosin head
b. Myosin head is re-energized
c. Myosin head forms cross bridge with actin
d. Power stroke moves thin filament
e. Cross bridges detach from actin
f. Myosin binding sites covered
g. Calcium ions pumped into the sarcoplasmic reticulum
h. Calcium ion concentration decreases below the threshold for binding to troponin.
Muscle contraction results from the interaction between actin and myosin filament proteins.
During muscle contraction, ATP binds to myosin, which passes to a high-energy state and it allows actin and myosin to detach from each other.The sarcoplasmic reticulum (SR) is a specialized type of endoplasmic reticulum in muscle cells that acts to regulate the concentration of cytosolic calcium (Ca2+).The sequential steps are as follow:
Myosin head forms cross bridge with actinPower stroke moves thin filamentATP attaches to myosin headCross bridges detach from actinMyosin head is re-energizedCalcium ions pumped into the sarcoplasmic reticulumCalcium ion concentration decreases below the threshold for binding to troponinMyosin binding sites coveredIn conclusion, muscle contraction results from the interaction between actin and myosin filament proteins.
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A medical term with a suffix usually describes a/an
Answer:
a condition, an action, or a relationship.
Explanation:
How have the fields of biotechnology, genetic engineering, and molecular biology affected the agricultural job
market?
A.They have created more jobs
B.They have spread the industry internationally
C.They have made the market obsolete
D.They have decrease the demand for farmers
Answer:
I think It's A. Hope it helps! :)
Explanation:
Colistin is an antibiotic used to treat infections in the bloodstream. Some bacteria are resistant to Colistin. Explain how these bacteria have become resistant to Colistin.
Answer:
They have adapted to it
Explanation:
Rutherford tracked the motion of tiny, positively charged particles shot through a thin sheet of gold foil. Some particles traveled in a straight line and some were deflected at different angles. Which statement best describes what Rutherford concluded from the motion of the particles? Some particles traveled through empty spaces between atoms and some particles were deflected by electrons. Some particles traveled through empty parts of the atom and some particles were deflected by electrons. Some particles traveled through empty spaces between atoms and some particles were deflected by small areas of high-density positive charge in atoms. Some particles traveled through empty parts of the atom and some particles were deflected by small areas of high-density positive charge in atoms.
Answer:
Some particles traveled through empty parts of the atom and some particles were deflected by small areas of high-density positive charge in atoms.
Explanation:
Rutherford concluded from his experiment that there are empty spaces present in most parts of the atom while a heavy positive charge is present in the nucleus of an atom due to which the tiny positively charged particles deflects because of positive-positive charge repulsion. Most of positively charged particles passes undeflected which indicated the presence of empty spaces in the atoms. The electrons revolve around the nucleus have no effect on the deflection of positively charged particles.
Rutherford conducted a legendary experiment to determine atomic structure in which he bombarded a thin gold foil with alpha particles. In the aftermath of the experiment he concluded that; Some particles traveled through empty parts of the atom and some particles were deflected by small areas of high-density positive charge in atoms.
The gold foil experiment showed that the atom is composed of a massive core which contains positively charged particles.
This massive core is at the center of the atom surrounded by electrons that move in orbits. Hence, the resulting model of the atom was called the planetary model.
The deflected positively charged particles were deflected by this small area of high-density positive charge in atoms.
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WORLD POPULATION GROWTH
20.000
10.000
World
5.000
Asia
Millions of people
2.000
Africa
1.000
Europe
500
200
United States
Mexico, Canada, & Greenland
100
Central America,
50 Caribbean Islands, &
South America
Oceania (Australia &
nearby islands in the Pacific)
10
1980
1950
1960
1970
1990
Year
Based on the information in the graph, which region's population will grow the
most in the next 40 years?
2000
2010
2020
2030
2040
2050
O A. Europe
O B. United States
O C. Asia
D. Africa
Answer:
option D
Explanation:
more than half of global population growth between now and 2050 is expected to occur in Africa. Africa has the highest rate of population growth among major areas
Based on the information in the graph, it is clear that Africa's population will grow the most in the next 40 years. Therefore, option (D) is correct.
Population refers to the total number of individuals of a particular species living in a specific geographic area at a given time. It is an important concept in ecology, as the size of a population can have significant impacts on the environment, other species, and human societies.
Populations can be studied at different levels of organization, from individual organisms to entire ecosystems, and can be characterized by a range of variables, including age structure, sex ratio, population density, and growth rate. Understanding population dynamics and how they are affected by factors such as competition, predation, disease, and human activities is crucial for effective conservation and management of natural resources.
Africa's population is currently only at 1,000 million people, which is much smaller than the population of Asia, which is at millions of people. Additionally, the graph shows that Africa's population is projected to increase rapidly in the coming decades, while other regions are projected to have more modest increases.
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What occurs when two species have the
need for the same resource?
Answer:
Competition. Additionally, with competition comes survival of the fittest.
Explanation:
Competition is formed when more than one species must fight for the same resource/commodity.
Match the enzymes to their role in the DNA replication process
Answer: A = 3, B = 5, C = 1, D = 2, E = 4
Explanation: A. RNA primase
B. ligase
C. helicase
D. polymerase
E. topoisomerase
Pairs
1. unwinds the DNA molecule
2. synthesizes the complementary daughter strands
3. synthesizes RNA primer at the initiation point
4. creates nicks ahead of the replication fork to relieve tension from unwinding
5. joins the Okazaki fragments together
Changes in DNA sequence from one generation to the next may result in offspring that are altered in fitness compared with their parents. The process of change and selection over the course of many generations is the basis of
Answer:
This question lack options, options are:
A. Mutation
B. Evolution
C. Heredity
D. Reproduction
The correct answer is B.
Explanation:
Evolution is essentially a process of genetic change over time, that is, it is the result of accumulated changes in the composition of the gene pool. Variation is the raw material of evolution. Without genetic variation, evolution is not possible. The ultimate source of all genetic variation is mutation. A mutation is a stable and inheritable change in genetic material. Mutations alter the DNA sequence and therefore introduce new variants. Many of these variants are usually eliminated, but occasionally some of these variants can be successful and incorporated into all individuals of the species. Mutation is a factor that increases genetic diversity. This is how evolution explains the origin of various life forms as a result of changes in their genetic load. The inheritance of these variations through offspring of parents who carry the variation, although the genetic endowment of a single organism is the same throughout life, the genetic makeup of a species, understood as a whole (genetic background), changes throughout from many periods of life. Mutations and variability, the product of natural DNA recombination, provide diversity in the genetic material of a species.
The function of the plasma membrane is....
Answer:
to protect the cell from it's surroundings
Explanation:
the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells
Explanation:
The primary function of the plasma membrane is to protect the cell from its surroundings.
Sorry if the ans is wrong
Imagine that you have added a fluorescent tag to all of the amino acids inside of a bacterium. You then infect the bacterium with a phage. At the end of the phage's lytic cycle, you examine the new phage particles for fluorescence. Which of the following new phage particle components would you expect to exhibit the fluorescent tag?A. phage DNAB. phage RNAC. phage capsomeresD. A and BE. A, B, and CF. none of the above
Answer:
The answer is A.
Explanation:
The bacteriophage is an organism that attacks bacteria and uses them to replicate it's DNA to reproduce and multiply.
If all the amino acids of the bacteria are flagged with fluorescent tag, then the new bacteriophage's DNA will exhibit the fluorescent tag because it will be constructed using the bacteria's protein molecules in the first place. So the answer is A.
I hope this helps.
If two people with sickle cell trait have children, what is thechance that a child will have normal RBCs in both high-and low-oxygen environments? What is the chance that a child will have sickle cell disease? Write the possible genotypes in the Punnettsquare.
Answer:
See the answer below
Explanation:
The chance that a child from two people with sickle cell trait will have normal RBCs remains the same irrespective of the amount of oxygen in the environment. From the cross:
AS x AS
AA AS AS SS
Hence, the chance of having a child with normal RBCs in both high and low-oxygen environments is 1/4 or 25%.
The chance that a child will have sickle cell disease is also 1/4 or 25%.
The possible genotypes in a Punnet's square can be seen in the attached image
What brings greater concentrations of dissolved nutrients to the ocean surface?
Answer: Upwelling
Explanation:
Upwelling is a process of movement of dense, cold and nutrient rich water from the bottom of the ocean to the surface layers due to wind currents. This process replaces the warm and nutrient deficient water from the surface.
This process is useful for the growth of phytoplanktons and other sea plants growing in the surface layer of oceanic water.
Which of the following is NOT a product of the light reaction?
Answer:
all but the last one
Explanation:
NADH is not a product of the light reaction of photosynthesis.
• The role of NAD+ is that it acts as an electron carrier.
• NADH is formed from NAD when it oxidizes the compound by accepting electrons and adding hydrogen ions to the compound.
What do NADH mean?
NADH stands for "Nicotinamide Adenine Dinucleotide (NAD) + Hydrogen (H)." This chemical occurs naturally in the body and plays a role in the chemical process that produces energy.People use NADH supplements as medicine.Learn more about NADH here.
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when the community climax in an ecosystem has only a single type of climax, the development of the climax community is controlled by ___ of that region.
a) the climate
b) the life forms
c) the soil texture
d) the pioneer community
Answer:
A.
Explanation:
because the climax community is composed of species beat adopted to average conditions in that area
When the community climax in an ecosystem has only a single type of climax, the development of the climax community is controlled by the climate of that region. Option A is correct.
The climate of a region is the most important factor that controls the development of a climax community. The climate determines the temperature, precipitation, and other abiotic factors that influence the growth and survival of plants and animals.
In a region with a single type of climax community, the climate is relatively uniform and there is little variation in the abiotic factors. This means that the same species of plants and animals will be able to survive and thrive in the region, regardless of the specific location. The life forms, soil texture, and pioneer community can all influence the development of a climax community, but they are not as important as the climate. Option A is correct.
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Explain TWO strategic ways employed by microbes of extreme environments that enable them withstand harsh environmental and physical conditions
Answer:
Explanation:
Some microbes are thermophiles and they can survive in area with high temperature between 45 -80°C, they are chemoautotroph in nature, oxidizing sulphur to products acids such as sulfur in the environment. This acid also help them to better adapt to the environment as many thermophiles likes acidic environment.
Thermophiles body has saturated and straight chain fatty acid that helps prevent denaturation which enables them grow and thrive in harsh weather condition by providing the fluidity that is needed in membrane function.
Thermophiles are also small in sizes this ensure there stability.
How Can Regulation be Accomplished? Chemotaxis by Pseudomonas aeruginosa requires regulation of macromolecules in response to signals. Protein regulation is very important and can be grouped into two categories: those that are based on protein activity and those that are based on the amount of protein present ,write the type of regulation described that does not affect the amount of protein present.
1. regulating amount of mRNA made
2. catabolite repression
3. post-translational modification small RNA (sRNA) regulation regulation of transcription
4. attenuation controlling whether mRNA is translated
Answer:
3. post-translational modification small RNA (sRNA) regulation regulation of transcription
Explanation:
The post-translational modification does not affect the amount of protein present because this type of change is only done to the protein when the translation process has finished, and there is a protein as a result. After the translation, the final product can suffer modifications such as the addition of different components, or enzymatic modifications. In other words, they are chemical changes that the protein experiences that do not affect the amount of protein present.
3. Mutations that occur in the BPG binding cavity on deoxyhemoglobin can at times result in the substitution of lysine and histidine residues present with aspartic acid and phenylalanine residues. Explain how these changes would impact BPG binding to deoxyhemoglobin along with the impact it would have on oxygen transport with hemoglobin
Answer:
It affects the oxygenation of the tissues in a negative way, that is, causing tissue hypoxias.
Explanation:
What will happen is that BPG, having a different relationship with deoxyhemoglobin, hemoglobin will not give oxygen to organs or tissues during glycolysis at times when the sympathetic nervous system is activated or even in the maintenance of physiological tissue vitality, therefore it will trigger a drop in the partial pressure of the gas both in the blood and in the tissues since they will be retained in the hemoglobin structure without being able to release it.