Answer:
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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.
What is breeding,explain in fully ?
➡️ When viewed from the perspective of the Turkish Language Institution in general, the meaning of "correction or improvement" stands out for the word reform. To express it as to make any situation better.
byy••Answer:
Breeding is mating or if an animal wants to reproduce (like having s e x), they will breed and have children. Humans are like the same. If humans want children, then humans mate because we're also animals...
Explanation:
man that was awkward
What terms identifies multiple pathways for energy flow within an area
A healthy yellow leaf has
A, No chloroplast
B, xanthophylls
C, no living cell
D, No photosynthesis
a healthy yellow leaf has no chloroplast.
A scientist makes a claim that a chemical in household cleaners causes cancer. Which question should other scientists ask about the claim if they are using scientific argumentation?
A. Is there too much of the chemical present in the cleaner
B. Should the cleaner be taken off the market
C. Are there safer chemicals that could be used in the cleaner?
D.are there other possible causes of cancer?
D. are there other possible causes of cancer?
Scientific argumentation involves testing hypotheses through rigorous experimentation and examination of evidence. In this case, before drawing any conclusions about the relationship between the chemical in the household cleaner and cancer, other scientists would want to examine whether there are other possible causes of cancer that should be considered. The scientist who made the claim would need to show through experiments and studies that the chemical in question is the cause of cancer and not some other variable that was not controlled in the study. And therefore, evaluating the evidence and testing the hypothesis is the fundamental part of scientific argumentation.
Please select the word from the list that best fits the definition
type of virus that begins to multiply immediately after it enters a cell
genetic material
active
inactive
vaccines
over-the-counter medications
ability to multiply
Answer:
availability to multiply or it could be active because it's an active virus but if it has the ability to multiply then it's just going to keep on doing it immediately faster and faster
A yellow round seed pea crossed with a green flat seed. the set up will be
YYRR
yyrr
The yellow tall are dominant
crossing hom. o zygous vs hom. ozygous
give the first set pick two of the first set and make a second set
Answer the following questions from the second set
1- Hom.zygous for yellow tall
2- Heterozygous for yellow tall
3- Hom.zygous for green flat.
Answer:
2 i think .... soooooooo confusing
Which of the following is not a step in the mass production of an organic substrate in a fermentor?
Select one:
a. Inoculate the sterile media in the growth vessel with the microbe of interest.
b. Adjust the environmental conditions for optimal growth of the organism.
c. Add enzymes to catalyze all required steps in the process.
d. Harvest cells and purify the product.
e. Remove waste products and dispose responsibly.
Answer:
c. Add enzymes to catalyze all required steps in the process.
UIZ:
.01: Layers of the Atmosphere
Quiz 1.01: Layers of the Atmosphere
Chemicals released into the air from human activity, such as sulfur dioxide and nitrous oxide, interact with the atmosphere to make acid
rain.
in which atmospheric layer does this process happen?
O stratosphere
Othermosphere
Otroposphere
O mesosphere
1 2
3
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4 5
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Chemicals released into the air from human activity, such as sulfur dioxide and nitrous oxide, interact with the atmosphere to make acid rain, troposphere atmospheric layer does this process happen.
Which layer of the atmosphere holds the majority of the air pollutants produced by human activity?The stratospheric ozone layer contains the majority of ozone. Over the entire world, the vertical extent or thickness of this layer varies with season and location. Air pollutants released by human activity cause ozone levels to rise close to the surface.
The major layers are the troposphere, stratosphere, mesosphere, thermosphere, and exosphere, listed from lowest to highest. Troposphere. The troposphere of Earth rises from its surface to a height of, on average, about 12 kilometers (7.5 miles), with its height being lower at the poles and higher at the equator.
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can ecosystem survive with only producers
Answer:
no
Explanation:
Can someone help me with this
Answer: NO SORRY
Explanation:
Do red blood cells have heterochromatin?
Yes, red blood cells have heterochromatin. Heterochromatin is a part of eukaryotic genomes responsible for gene expression DNA Repair and replication.
Differentiation of Erythroid to mature red blood cells(RBC) is done by multiple erythropoietin operated by signal transduction pathways, this process is also called terminal erythropoiesis. During this process chromatin gradually condenses which is critical for red cell terminal differentiation and final enucleation.
Therefore, the deciphered red blood cells could gain more space for hemoglobin development and flexibility to pass through terminal capillaries.
Chromatin exists in two forms euchromatin, is less condensed, and can be duplicated whereas heterochromatin, is highly concentrated and is typically not duplicated.
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One way to determine the density of animals in an area is to use the mark-recapture technique. A number of individuals from a population are captured, marked so they are easily identifiable, and released back into the population. It's assumed that the captured and marked animals will randomly mingle with the rest of the population. Later, the population is re-sampled and the number of marked and unmarked animals is recorded. The following equation can then be used to estimate the size of the entire population. Gulded S Number of individuals marked in first catch Total population size, N Number of marked recaptures in second catch Total number of second catch If 25 Prairie Dogs were captured, marked, and released back into their population, and then subsequently 135 Prairie Dogs were captured, of which 18 were marked, what is the approximate total population size, N?
Answer:
The approximate total population size, N = 188 Prairie Dogs
Explanation:
The equation of the mark-recapture technique of determining population density is given below:
Number of individuals marked in the first catch/Total population size, N = Number of marked recaptures in second catch/Total number of second catch
If 25 Prairie Dogs were captured, marked, and released back into their population, and then subsequently 135 Prairie Dogs were captured, of which 18 were marked
Number of dogs marked in first catch = 25
Number of marked recaptures in the second catch = 18
Total number of second catch = 135
Substituting the given figures and solving for N, the total population:
25/N = 18/135
18N = 25 × 135
18N = 3375
N = 3375/18
N = 187.5
Thus, the approximate total population size, N = 188 Prairie Dogs
Helpppppppp plsss it’s due at 11:59
The component of a vaccine that makes it effective is the antigen.
What is a Vaccine?
A vaccine is a biological preparation that induces active acquired immunity to a specific disease. It contains an agent that resembles an infective microorganism and is frequently composed of weakened or killed forms of the microbe, its toxins, or one of its surface proteins. Vaccines are intended to stimulate the body's own immune system in order to protect the individual from future infection or disease.
11) An antigen is a substance that causes the body to produce antibodies when it enters the body. These antibodies help the body recognize and fight the antigen if it enters the body again.
12) A vaccination is a way of introducing a weakened or killed version of a particular virus, bacteria, or toxin into the body. This weak or dead version of the virus, bacteria, or toxin stimulates the body's natural defense system to produce antibodies that are specific to that virus, bacteria, or toxin. These antibodies can then recognize and fight off the real virus, bacteria, or toxin if the body is ever exposed to it, thus preventing the individual from getting the disease. This is known as active immunity. The immunity created by the vaccination is typically long-lasting, and in many cases, lifelong.
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The fossil of S. crassirostris was found in limestone that formed in a warm sea-
water lagoon. What could you infer were the feeding habits and food of this
animal? Explain your answer.
The location of the fossil of S. crassirostris suggests that they might have eaten similar to modern-day "skimmers," a rare breed of shorebirds from the genus Rynchops that flies over still bodies of water and uses its submerged lower jaw to scoop up small fish and crustaceans.
What are Feeding Habits?The term "feeding habit" can apply to both the type of food that an animal consumes and the manner in which it obtains it.
Fossils are any surviving remains, impressions, or evidence of a once-living thing from a previous geological epoch. Examples include exoskeletons, bones, shells, animal or microbe imprints in stone, items preserved in amber, hair, petrified wood, and DNA traces.
An example is the fossil of S. crassirostris was found in limestone that formed in a warm sea-water lagoon.
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What is the structure of a nucleotide? What are DNA's four nucleotides, and how do they pair up?
Answer:
Attached to each sugar is one of four bases--adenine (A), cytosine (C), guanine (G), or thymine (T). The two strands are held together by hydrogen bonds between the bases, with adenine forming a base pair with thymine, and cytosine forming a base pair with guanine.
Which of the following statements is NOT true about cellular respiration?
1. Cellular respiration breaks down sugars and other molecules to use the stored energy.
2. Cellular respiration occurs in the chloroplast in plant cells.
3. Cellular respiration occurs in the mitochondria of cells.
4. Both plants and animals perform cellular respiration.
Its in science but I have to click Biology because it didn't have the option to click science.
Answer:
Option 2 is not true (Cellular respiration occurs in the chloroplast in plant cells)
Explanation:
Photosynthesis occurs in the chloroplasts, whereas cellular respiration occurs in the mitochondria. Photosynthesis makes glucose and oxygen, which are then used as the starting products for cellular respiration. Therefore, cellular respiration takes place in the mitochondria in plants, not in chloroplasts.
Hope it helps :)
Have a great day!
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.an object decelerate uniformly from 60.0m/s to a stop in 10.0s what is it acceleration?
a. 6.0m/S2
b. -6.0/S2
c.600m/S2
d.-600m/S2
Answer:
I'm not 100% sure, but I think its a. 6.0m/s2
1. What is the primary function of the small intestines? (1 point)
A.uses mechanical digestion to break down food particles
B uses chemical digestion and absorbs nutrients the body needs
C carries food and nutrients throughout the body
D eliminates the waste the body does not need
A
Utilizes chemical digestion to assimilate nutrients for the body.
What are the small intestine's three purposes?The small intestine's main jobs are to digest food, absorb nutrients needed by the body, and eliminate unwanted substances. Additionally, it contributes to the immune system by serving as a barrier to the diverse flora that lives in the gut and preventing the entry of dangerous germs.
Does food undergo chemical breakdown in the small intestine?Most chemical digestion and nearly all absorption occur in the small intestine. Large food molecules are broken down chemically during chemical digestion into their component parts, which can subsequently be absorbed past the intestinal wall and into the bloodstream.
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Answer:
Explanation:
Answer is B uses chemical digestion and absorbs nutrients the body needs
The autonomic nervous system is the part of the peripheral nervous system that is responsible for
1. skeletal muscle movement.
2. involuntary bodily functions, such as sweating.
3. light, sound, taste, and smell detection.
4. new cell development.
Cuáles son las definiciones de la segunda ley de la termodinámica?
Ayudaaa!
Answer:
La consistencia de la energía es el tema de la Segunda Ley de la Termodinámica. Afirma que cuando la energía se transmite o se convierte, se pierde una mayor proporción de ella. La Segunda Ley también señala que toda estructura aislada tiene una propensión normal a degenerar en un estado más desordenado.
Explanation:
If the DNA is TTA convert into mRna and then into tRNA
Explanation:
uuA please can you send me the invoice for
If there is a nondisjunction during Meiosis II, what number of chromosomes or chromatids will the cells have in them at telophase II?
Describe the modifications that can be done on a polypeptide chain to make it a fully functional
protein
Answer: Polypeptide chains undergo some modifications before they become fully functional. Some of these modifications include: proteolytic cleavage, lipidation and glycosylation. Proteolytic cleavage refers to the removal of some amino acids from a polypeptide chain by proteases in order for the protein to become active. An example of a substance that is modified through this process is insulin.
Explanation:
Problems of large size in animals
Answer:
could be not enough place or destruction to the environment
Answer:
Here's your answer
Explanation:
There is also a major disadvantage to being big. The body mass of an animal is proportional to the gravitational force that it experiences. So as an animal increases in mass, the amount of force that its skeleton needs to support or resist must also increase.
you are in the year where the earth has no more land available for houses you decide to build an apartment up and need things to survive in each earths 5 layers (troposphere,stratosphere, mesosphere, thermosphere, exosphere) Question: what things would you need to survive the stratosphere (starts cold and ends hot)
Answer:
To survive in the stratosphere, you would need a space suit with a pressurized environment, oxygen tanks, a heat source, and a cooling system. You would also need a means of propulsion, such as a rocket or jetpack, to move around. In addition, you would need a way to communicate with other people on the ground or in other parts of the stratosphere. Finally, you would need a way to protect yourself from the extreme temperatures and radiation in the stratosphere.
Explanation:
Inventions Promote Change
4. How did the harnessing of electricity transform American business?
Around 1900, organizational and technological advancements in electricity sparked a new industrial revolution. The appearance of enterprises and cities was altered by electrical illumination and motors.
Businesses were able to expand their locations and increase their productivity thanks to centrally produced electricity. These accomplishments depended on the development of massive interconnected systems, most of which were monopolies controlled by corporations.
Before the war, the electricity business grew slowly, but in the 1920s it truly took off and played a significant role in the economic growth.
It offered factories a low-cost, effective source of power. It allowed for the simultaneous use of numerous sophisticated machines, paving the way for the development of mass production methods.
Because it provided the power required in consumers' homes for the new mass-produced goods, such as vacuum cleaners, refrigerators, and washing machines, electricity also contributed to the economic boom.
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Overhead view of mountains and rivers. Label B is at smaller flows of water that meet to create a larger flow of water at Label A.
Use the drop-down menu to identify what each label shows.
A
✔ river
B
✔ tributary
The diagram Illustrated shows that A is a river and B is a tributary.
What is a river?A river is a body of water that resembles a ribbon and moves downward under the influence of gravity. A river may be both wide and deep or it may be only shallow enough to wade across.
A stream or river that empties into a larger stream, main stem river, or lake is referred to as a tributary or affluent. A tributary does not empty into the sea or the ocean directly. The surrounding drainage basin is drained of its surface water and groundwater by tributaries and the main stem river, which discharges the water into the ocean.
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Match each stage of demographic transition with its correct description. (3 points)
a. High birthrates, high infant mortality rate, no health services or family planning options
b. High birthrates, decline in deathrates, increased health services but limited family planning options
c. Low birthrates, low deathrates, higher quality of health services and family planning options
here's the CORRECT answer
Stage 1 A
Stage 2 B
Stage 3 C
The stage of demographic transition with its correct description include the following below:
Stage 1 - High birthrates, high infant mortality rate, no health services or family planning options which is denoted as option AStage 2 - High birthrates, decline in death rates, increased health services but limited family planning options which is denoted as option B.Stage 3 - Low birthrates, low death rates, higher quality of health services and family planning options which is denoted as option C.What is Demographic?This is a term which is used to describe the statistical characteristics of human populations such as age or gender and is also used especially to identify different types of markets.
In the chart we can see that the birth rate was falling in stage 3 mwhich means that there are family planning options which is adopted hence such result.
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