Answer:
On May 18, 1980, an earthquake struck below the north face of Mount St. Helens in Washington state, triggering the largest landslide in recorded history and a major volcanic eruption that scattered ash across a dozen states
Explanation:
Does every gene combination show up in the offspring?
Answer:
Answer!
Explanation:
Okay so, genes come in different varieties; which are called allele. somatic cells contain two alleles for every gene, with one allele provided by each parent of an organism. BUT, an allele that is hidden, or not expressed by an organism, can still be passed on to that organism's offspring and expressed in a later generation.
During meiosis I, chromosomal pairs randomly align along the metaphase plate. Each chromosome pair member carries one allele for each gene. Every gene combination shows up in the offspring.
Chance determines which of the 23 homologous pairs of both parents' chromosomes are inherited. The possible combinations of 23 chromosomal pairs total 8,324,608. As a result, the chromosomal combinations of two gametes are almost never identical.
Actually, each parent has two distinct gene pools. Additionally, only half of each parent's DNA is passed on to their offspring. and that the randomness of the portion that is passed down. All of these factors work together to guarantee that every child has a distinct collection of genes.
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The diagram shows an energy pyramid.
If the flowers contain 50,000 kcal of energy, about how
much energy will the lizard obtain from eating the
butterfly?
Quaternary Consumer
500 kcal
O 5,000 kcal
50,000 kcal
500,000 kcal
Tertiary Consumer
Secondary Consumer
Primary Consumer
Producer
Answer:
Its A for Edgeunity
Explanation:
Every consumer it passes through loses a 0, so
Flower: 50,000
Butterfly: 5,000
Lizard: 500
Answer:
Either d or c, listen I think it might be c actually
Explanation:yes
What is one BENEFIT of internal development for the human embryo?
Answer:
Internal fertilization has the advantage of protecting the fertilized egg from dehydration on land. The embryo is isolated within the female, which limits predation on the young. Internal fertilization also enhances the fertilization of eggs by a specific male.
Intercalated disc between cardiac muscle cells serve to transfer
Answer:
Serve to transfer signals between cells.
Explanation:
Intercalated disc also called gap junctions are structural formations that are located between the myocardial cells of the heart. They help to bond or connect cardiac cells fibers together. They also help in cell to cell communications and propagate action potential. They serve to transfer signals between cells.
Which of these materials are organic? (Select all that apply.)
A. rock
B. leaf
C. clay
D. bacteria
(PICK MORE THAN ONE)
Answer:
All of them
Explanation:
Answer:
B. leaf and
D. bacteria
Explanation:
what is arranged in energy levels outside of the nucleus
Answer:
We will start with a very simple way of showing the arrangement of electrons around an atom. Here, electrons are arranged in energy levels, or shells, around the nucleus of an atom.
Explanation:
Homologous recombination can be used in the lab to replace a gene of interest with a selection marker. To confirm that the selection marker is integrated into the correct place in the genome, sometimes a negative selection is used in addition to the standard positive selection marker. Which of the following would act as a negative selection marker?
a. Transformation of a different gene, which does not act as a selection marker, to replace the gene of interest.â
b. A second marker in the knock out cassette, that if inserted into the genome results in cell death when plated on selective media.
c. Transforming the cells with two different knock out cassettes, each containing the same selection marker3. â
Answer:
b. A second marker in the knock-out cassette, that if inserted into the genome results in cell death when plated on selective media.
Explanation:
General recombination, also known as homologous recombination, refers to the naturally occurring process of exchange of genetic material between pairs of homologous DNA sequences. This process (homologous recombination) can be exploited by genetic engineering to insert DNA segments of interest at target genes. Moreover, a cassette is a mobile DNA segment containing almost a gene and a recombination site, which is integrated into the locus/loci of interest by homologous recombination. A cassette may contain a DNA segment called 'negative marker' which prevents growth under particular conditions, while a positive marker permits growth under certain conditions. In consequence, a second marker consisting of a drug cassette may be used as a negative marker in order to evidence its insertion by inducing cell death when they are plated in selective conditions.
PLEASE ILL LITERALLY DO ANYTHING You have learned that the human body is made of different systems. These systems work together to help the body function. In this project, you will research how different body systems interact. OBJECTIVES Describe the interaction between human body systems. Directions Use online resources or a reference of your choosing to research two body systems from the list below. Write a 400 word essay describing each system and how they interact. Be sure to include the major organs and structures of each system. Also identify the functions and responsibilities of each system. Describe how each system depends upon the other. circulatory system respiratory system digestive system excretory system nervous system
Answer:
The Circulatory system has two organs the heart, and blood vessels. The heart pumps blood and the blood is carried away and back through blood vessels like capillaries, veins, and arteries. The Circulatory system works with the Respiratory system by carrying the oxygen that is brings in, and takes away the carbon dioxide to the Excretory system. The Circulatory system helps the Excretory system by bringing waste, and carbon dioxide to kidneys, and liver I believe it might be a different organ but I know the kidneys for sure.
The Nervous system consists of three organs the spinal cord, brain, and nerves. The two systems are the Central Nervous system is made up of the the brain, and spinal cord. The Peripheral system is made up of the nerves, which branch off from the spinal cord to all parts of the body. The Central Nervous system sends a jolt of electricity from the brain through the spinal cord to the nerves that branch of it to all parts of the body so that we can move. The Nervous system helps the Digestive system by sending electricity to the nerves so that we can swallow our food and so that we can digest our food. The Nervous system helps the Excretory system by detecting any changes in the salt levels in the blood through the urine in the Excretory system. By providing the brain with a constant supply of oxygen rich blood the Circulatory system helps the Nervous system, so the Nervous system regulates the heart rate and blood pressure. So that the Nervous system can regulate the Respiratory rate, and monitor the blood gas levels the Respiratory system supplies oxygen, and removes carbon dioxide.
The Excretory system consists of five organs the Large Intestine, Liver, Lungs, Kidneys, Skin. The Excretory system helps the Digestive system by getting rid of the waste it produces. The circulatory system helps the Excretory system by giving the kidneys, and the other organs in the Excretory system blood, and carry carbon dioxide from cells to the kidneys.
The Respiratory consists of five organs Lungs, Larynx, Trachea, Pharynx, and Bronchi. The Respiratory system provides the body with oxygen, and allows us to breath.
The Digestive System consists of nine organs, the Mouth, Esophagus, Stomach, Pancreas, Liver, Gallbladder, Small Intestine, Large Intestine, and the Anus. The Digestive system dissolves food and turns them into nutrients for cells, to give them energy, use for growth, and cell repair.
Explanation:
Hope this helps:)
keera ingram
Kidneys are part if rhe excretory system in a human body.they purify the impure blood and sned it back to the rest of the body. Which system is mainly responsible for the transport of plasma to the kidneys?
Answer:
circulatory system
Explanation:
The circulatory system is mainly responsible for the transport of plasma to the kidneys
Answer:
Circulatory system
Explanation:
In which step of protein synthesis does the rRNA make protein?
Answer:
Translation is the second part of the central dogma of molecular biology: RNA → Protein. It is the process in which the genetic code in mRNA is read to make a protein. Translation is illustrated in the diagram below. After mRNA leaves the nucleus, it moves to a ribosome, which consists of rRNA and proteins.
Explanation:
Within the ribosome, the rRNA molecules direct the catalytic steps of protein synthesis — the stitching together of amino acids to make a protein molecule. In fact, rRNA is sometimes called a ribozyme or catalytic RNA to reflect this function.
a.
Which of the following best describes daily temperatures in deserts?
hot during the day and cold at night
b. hot during the day and warm at night
C. cool during the day and very cold at night
d. they depend upon the type of desert and its location
Please select the best answer from the choices provided
Ο Α
ОВ
С
D
Answer:
A
As sand cannot hold the heat for long, it gets cooler as soon as the sun sets
Explanation:
A
Sana maka touilong makatulong
Which statement about the factors that affect the affinity of hemoglobin for oxygen are FALSE? Group of answer choices Decreased O2 partial pressure diminishes affinity and this favors oxygen unloading and delivery to the tissues. CO2 increases the affinity of oxygen for hemoglobin so that hemoglobin binds oxygen more strongly. Decreased blood temperature increases hemoglobin affinity for oxygen. The affinity of hemoglobin for oxygen is higher than for carbon dioxide which results in oxygen being able to displace carbon dioxide from hemoglobin as the blood travels through the pulmonary capillaries. With decreasing pH, affinity decreases so that more oxygen is released from hemoglobin.
Answer:
CO2 increases the affinity of oxygen for hemoglobin so that hemoglobin binds oxygen more strongly
Explanation:
Hemoglobin (Hb) is a protein found in red blood cells that functions to transport oxygen (O2) to the tissues. This protein has four subunits and each subunit binds to a heme group. Each heme group in Hb contains an iron atom that binds to one O2 molecule. The affinity of hemoglobin for O2 is a critical mechanism that is dependent on the ability of Hb to carry O2 molecules. Hb is fully saturated with O2 when all of its four O2-binding sites are occupied. Moreoever, the O2-hemoglobin dissociation curve is a plot of saturation of Hb regarding the partial pressure of O2 (PO2). A rightward shift in the curve indicates that Hb has a decreased affinity for O2, while a leftward shift in the curve indicates that Hb has an increased affinity for O2. As CO2 concentration increases, hemoglobin's affinity for O2 decreases, thereby Hb binds to O2 less tightly at heme group sites and therefore the dissociation curve shifts to the right.
2_2 Breathing
Using complete sentences, explain how the muscular, skeletal, respiratory and circulatory systems work together to get oxygen from outside your body into your lungs.
Explanation:
Your digestive system absorbs water and nutrients from the food you eat. Your circulatory system carries oxygen, water, and nutrients to cells throughout your body. Wastes from the cells are eliminated by your respiratory system, your excretory system, and your skin.
1. Draw Conclusions Which petri dish showed the greatest amount of growth after one
Week? Why? NO LINKS OR MESSING AROUND PLEASE OR REPORTED INSTANTLY⚠
Answer:
i think its the first one because it has more moist environment checked after a week
Explanation:
i hope this is what u needed ;)
8. La metáfora "sin ti no podria vivir", a qué orgánulo
celular se refiere. Justifica to respuesta.
Esta cita se refiere a las mitocondrias. Las mitocondrias juegan un papel muy importante en la vida de las células, esto se debe a que sin las mitocondrias, la célula no podría sobrevivir.
what precaution must be observed when working with alcohol
Answer:
When handling isopropyl alcohol in a work environment (to best to avoid any contact with skin) protective clothing should be always be worn, including safety gloves and goggles. The area should also be well-ventilated and have a wash station nearby
Histone modification: is fixed; once a histone is modified, it stays that way and the genes with which it is associated are turned on or off permanently. is random and independent of the environment or cell type. is fixed, but this has no effect on whether genes are expressed. can change over time in response to environmental cues, allowing genes to be turned on or off as needed. can change over time in response to environmental cues, but this has no effect on gene expression.
Answer:
The correct answer is ''can change over time in response to environmental cues, allowing genes to be turned on or off as needed.''
Explanation:
Histones are a family of proteins involved in compacting DNA into structural units called nucleosomes. Histone modifications occur in response to environmental conditions, and modulate the structure of chromatin, that is, they alter the structure of nucleosomes and therefore chromatin, and thus activate the transcription process, in which the chromatin is in the euchromatin state (loose conformation, in which the DNA information can be read), or "off" state, in which the chromatin adopts the heterochromatin conformation (compact conformation, which prevents reading), respectively. These post-translational modifications are mainly acetylation, methylation, phosphorylation, although there are many others. These make up the “histone code” that can change the expression pattern of some genes by modifying the chromatin structure, activating or silencing these genes.
Definition: This is a segment of DNA on the chromosome that is coded for a particular trait.
Example: Color of flower in pea plants.
Help
Answer:
I think it's Gene, maybe!
Which greenhouse gas is internationally regulated due to its impact on the ozone?
Answer:
Chlorofluorocarbons (CFCs)
hope it helps.
Answer:
hope it's helps you have a great day keep smiling be happy stay safe.Does anyone know this question!?
Answer:
B. Analogous structure
Explanation:
The wings of a bat and a butterfly perform similar function. They are believe to have evolved differently from different ancestors, however, they perform the same function.
Such structures are referred to as Analogous structures.
Analogous structure like the wing of butterfly and bat appear similar and perform similar function. They have evolved separately to become adapted to perform similar function.
Female African elephants are, on average, 7 - 9 feet tall. What is the upper end of this range in centimeters?
Note that 1 in. = 2.54 cm, 100 cm = 1 meter and 12 in. = 1 ft.
[0.01]Ethan began making a model to show the processes which resulted in the formation of oceans.
Sea floor
spreading
Earth's
plates meet
?
Which of the following would be the next step in the process?
Crust is broken down
Earth's crust moves
O Earth's plates meet
O sea floor spreading
20 Points plz help
How do spectroscopes help with studying of distance stars? A. it breaks apart lights that comes from Stars far away. B. it gives a clear image of the shape of stars. C. it collects sound waves from distant Stars. D. it measures the distance of far away Stars.
Answer:
"It lets you see the chemicals being absorbed or emitted by the light source.
What did you learn about invertebrates and vertebrates?
Answer:
Vertebrates have a skeletal structure with a spinal column or backbone. Invertebrates have no backbone, while vertebrates have a well-developed internal skeleton of cartilage and bone and a highly developed brain that is enclosed by a skull. ... Due to lack of a supportive system, a majority of invertebrates are small.
Explanation:
What do you think this is used for?
Answer:
this can be used for many things but most importantly transportation. you can go from place to place much faster than on your feet.
The Barton Springs salamander is an endangered species found only in a single spring in the city of Austin, Texas. There is growing concern that a chemical spill on a nearby freeway could pollute the spring and wipe out the species. To provide a source of salamanders to repopulate the spring in the event of such a catastrophe, a proposal has been made to establish a captive breeding population of the salamander in a local zoo. The zoo was asked to provide a plan for establishing this captive breeding population, with the goal of maintaining as much of the genetic variation of the species as possible in the captive population.
What factors are likely to lead to a loss of genetic variation in the captive population?
a. increased rate of mutation
b. a founder effect
c. reduced genetic drift over time
d. a lack of inbreeding
What strategy would likely be effective in mitigating the loss of genetic variation in the captive population?
a. keeping the sex ratio as close to 50:50 as possible
b. stopping gene flow to and from the captive population
c. regularly mating individuals that are related
d. keeping the captive population as small as possible
Answer:
1) Option b is correct. a founder effect
2) Option a is correct. keeping the sex ratio as close to 50:50 as possible
Explanation:
The exposed situation is an example of an ex-situ conservation program. These programs are planned to keep and restore the population of species that are in danger of extinction. There are many challenges associated with captivity, and one of them is related to maintaining genetic diversity in the population.
1) Introducing a few animals of an endangered species into the zoo might be considered an example of the founder effect. Just a pregnant female is enough for it to occur. And the most significant problem associated with this event is the loss the genetic diversity or variability. When breeding animals in captivity there is a high risk of losing some genes and fixating others, due to inbreeding.
Genetic drift is the random change that occurs in the allelic frequency of a population through generations. The magnitude of this change is inversely related to the size of the original population. These changes produced by genetic drift accumulate in time. Eventually, some alleles get lost, while some others might set. Genetic drift affects a population and reduces its size dramatically due to a disaster or pressure-bottleneck effect- or because of a population split -founder effect-. In founder effect, a new population originates when a few individuals, coming from a bigger-sized population and carrying their genes, settle down in a new area and reproduce. This small population might or might not be genetically representative of the original one. Some rare alleles might be exceeded or might be lost by complete. Consequently, when the small population increases in size, it will have a genetically different composition from the original one. In these situations, genetic variability is reduced, and there exists the possibility of developing a peculiar allelic composition. When the number of individuals that originated the new population is low, the founder effect will be very extreme because the genetic drift effects are inversely proportional to the original number of individuals.
2) When selecting the animals that are being kept in captivity, it is significant to consider a few aspects concerning genetic diversity maintenance. The main objective is to prioritize the original genetic material.
To get founder individuals that get to represent the maximum genetic variability of the population, or among population if possible. The sex proportion of the founder individuals should always be 1:1 or 50:50. This ratio is important to keep genetic variability, especially because many males in captivity might have reproductive problems. To keep diversity, females need to mate with different males, and not just a few of them. Animals should be subadults reaching their sexual maturity.When mating animals, they should be as different as possible to decrease the possibility of a common ancestor among the couple.Why do organisms compete for food and water?
Answer:
Organisms compete for the resources they need to survive- air, water, food, and space. In areas where these are sufficient, organisms live in comfortable co-existence, and in areas where resources are abundant, the ecosystem boasts high species richness (diversity).
Explanation:
The process of change in the living parts of the ecosystem The process of change in the living parts of the ecosystem is called what succession ??
Ecological Succession....
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Mount Kilimanjaro is located in Eastern Africa at 3 degrees S. Which climate factor best explains the presence of permanent snow on its peak
Answer:
Elevation
Explanation:
The climate factor which best explains the presence of permanent snow on its peak is high elevation or altitude.
What is Altitude?This is defined as the height of an object or substance which is normally above the reference level.
High altitude means a colder environment and thus is the reason why there is presence of permanent snow on the mountain's peak.
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Carbon dioxide moves through the plasma membrane through the process of
A. osmosis
B. active transport
C. diffusion
D. facilitated diffusion
E. both diffusion and osmosis