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2023-05-24, resolved by a verified expert
Heterochromatin refers to the condensed packaged form of DNA and is divided into two types as facultative and constitutive heterochromatin. These types of heterochromatin perform an essential function in gene expression.
A feature of heterochromatin is the prevalence of genetically inactive sequences called satellite sequences. Therefore, it generally consists of repetitive DNA sequences. Several examples of heterochromatin are telomeres, centromeres, and repetitive DNA. So all the above options are correct.
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Biology
Which of the following are examples of heterochromatin? select all that apply. select all that apply. centromeric DNA repetitive DNA telomeric DNA
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Heterochromatin refers to the condensed packaged form of DNA and is divided into two types as facultative and constitutive heterochromatin. These types of heterochromatin perform an essential function in gene expression.
A feature of heterochromatin is the prevalence of genetically inactive sequences called satellite sequences. Therefore, it generally consists of repetitive DNA sequences. Several examples of heterochromatin are telomeres, centromeres, and repetitive DNA. So all the above options are correct.
Biology
Choose the right answer. Maria wanted to grow ferns in her garden. At the suggestion of a friend, she collected brown specks from the undersides of fern fronds and then planted them in pots. After a few days, Maria saw small fronds coming out of the container. Which statement explains this phenomenon? A. The fern has passed from the gametophyte generation to the sporophyte generation. B. The fern grew as a result of mitosis. C. The fern has passed from the sporophyte generation to the gametophyte generation. D. The fern became genetically identical
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Option A: The fern has passed from the gametophyte generation to the sporophyte generation.
Biology
Leslie claims that an organism called Euglena is a plant because it is eukaryotic, has a nucleus, makes its own food, and is unicellular. Where is Leslie's fault?
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Leslie claims that an organism called Euglena is a plant because it is eukaryotic, has a nucleus, makes its own food, and is unicellular. Where is Leslie's fault?Plants do not produce their own food..
Biology
At school, Brendan was conditioned to get up from his seat every time he heard the school bell. Brendan was eating in McDonald's with friends when a loud noise, similar to a school bell, came from the kitchen. Without thinking, Brendan jumped up from his seat at McDonalds. Mark the following for this scenario: Unconditioned stimulus (US): Conditioned stimulus (CS): Unconditioned response (UR): Conditioned response (CR):
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At school, Brendan was conditioned to get up from his seat every time he heard the school bell.
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Biology
That was most likely the effect on society that came from improvements in blood donation during the First and Second World Wars
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Answer:
Efficient food supplywas most likely an effect on society due to improvements in blood treatment during the First and Second World Wars.
Biology
Give examples of myths about aging that many people believe. Why are these myths harmful?
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Myths about aging:
Depression and loneliness are common in the elderly. ...
The older I get, the less sleep I need. ...
Older people cannot learn new things. ...
It is inevitable that the elderly will develop dementia. ...
The elderly should take it easy and avoid exercise to avoid injury.
Biology
We heard that seeds are rich in protein. If we were to open a seed and look under a microscope at this store of protein, in what cell structure would we find it? Why does the seed need this protein supply?
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You need this protein supply:
The seed consists of three components:embryo, endosperm (sometimes perisperm) and seed coat. Both the endosperm and the embryo are products of double fertilization while the seed coat develops from maternal, ovular tissues. The seed habitus is an important advance in the evolution of higher plants.
Anatomy of the Seed:-
Proteins for seed storagethey provide a source of amino acids and reduced nitrogen necessary for seedling germination and early growth.
Biology
Which of the following distinguishes why large corporate farms are losing public favor? Farmers raise prices due to water shortage. The public is alarmed by unnatural farming practices on farms. Farms withheld food to get more money. The quality of food on farms has declined since the 1980s.
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Consumers are dissatisfied with how large corporate farms treat nature's natural resources.
Biology
A binary star system consists of stars with one brighter than the other. Astronomers can detect a darker star because gravity makes the bright star . Astronomers can also detect a fainter star by observing a phenomenon called (n)binary. This happens when a faint star passes in front of a bright star.
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Astronomers can detect a darker star because gravity makes the bright star . Astronomers can also discover a fainter star by observing the so-called phenomenonone (n) binary number.
Biology
What are the roles of mushrooms? Check all that apply. Mushrooms can be used to develop medicines. Mushrooms are a food source for animals and humans. Mushrooms produce oxygen for breathing. Fungi destroy rocks and minerals. Mushrooms are natural recyclers. Fungi cause infections.
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Mushrooms are a food source for animals and humans. Mushrooms produce oxygen for breathing. Fungi destroy rocks and minerals. Mushrooms are natural recyclers.
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What is an example of a heterochromatin? ›
The best-known example of facultative heterochromatin is the inactive X chromosome of female mammals, in which one of the X chromosomes is permanently inactivated early in development, apparently as a means of dosage compensation, so that the amount of X-chromosome gene products produced is similar in males (with only ...
Which of the following are examples of heterochromatin select all that apply? ›Barr body, centromeres, telomeres, etc are examples of various heterochromatin. Barr body is an inactivated X chromosome in females. The centromere is DNA sequence located in the middle of a chromosome that links sister chromatids.
What are the three types of heterochromatin? ›- Heterochromatin:
- Types of heterochromatin:
- Constitutive heterochromatin:
- Facultative heterochromatin:
Constitutive heterochromatin is composed mainly of repetitive elements and represents the typical inert chromatin structure in eukaryotic cells. Approximately half of the mammalian genome is made of repeat sequences, such as satellite DNA, telomeric DNA, and transposable elements.