Answer:
The correct answer is ''undergo irreversible repression.''
Explanation:
The morphological and physiological transformation of meristematic cells into adult or differentiated tissues constitutes the process of cell differentiation. This, and the consequent specialization of the cell, bring about the division of labor, forming cells with specific functions. Differentiation occurs by differential activation of some genes and repression of others. Depending on the position it occupies, each cell receives certain stimuli to develop the corresponding activities. During the differentiation process, cells undergo a series of changes in their characteristics and there is a readjustment in their mutual relationships.Different molecular factors initiate and drive the programming / reprogramming of cell fate through the modulation of specific genomic and epigenomic patterns, which regulate the expression of activator / repressor genes of the main fundamental and specialized cellular processes. Thus, the differentiated cell will express certain genes and acquire certain functions.Adult stem cells are responsible for maintaining the different types of specialized cells that make up the body. Asymmetric cell division in stem cells has emerged as one of the main physiological mechanisms that regulate the number of cells and their diversity to maintain tissue homeostasis. A large number of molecules, generically called determinants of cell fate, participate in the regulation of asymmetric division. Asymmetric division of somatic stem cells produces both a stem cell and a progenitor. The initial progenitor cells, through new cycles of asymmetric cell division, finally reach their terminal state of cell differentiation, due to changes in intracellular and extracellular (environmental) signaling. After cells leave their mother state and begin to differentiate, they make exclusive selections for phenotypic pathways through secondary genomic / epigenomic modifications, mainly to different types and gradients of transcription factors (physiological programming of cell differentiation). This leads, for example, to activation of specialized biosynthetic pathways, remodeling of the cytoskeleton, and repression of cell proliferation signaling. The expression of genes is regulated mainly at the level of their transcription. Transcription factors correspond to proteins with the ability to interact with specific DNA sequences and trigger their transcriptional activity. Most transcriptional factors contain different domains that participate in different aspects of protein function; they generally contain two domains: a domain that binds to specific DNA sequences and an activation domain that regulates transcription by interacting with other proteins. In the regulation of gene transcription, in addition to transcription factors, coactivating and corepressor molecules participate, which bind to them, modifying their activity in a positive or negative sense. Each cell type has a characteristic pattern of gene transcription, which is determined by the binding of combinations of transcription factors to the regulatory regions of a gene.
Cellular differentiation progressively restricts cell fate because the unexpressed genes in the cell are undergoing irreversible repression.
What does the term gene repression mean?
Gene repression is the switching off of unique genes whose products are needed to support the function of the cell such as the production of vital enzymes or cofactors.
This is specifically important if the products of such genes are not long-lived and deteriorate, or are metabolized.
Thus, option "D" is undergo irreversible repression.
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Species with ___ genetic variation are ____ likely to survive?
A. More, less
B. Less,less
C. More,more
D.less, more
Which of the following conditions would activate the unfolded protein response? (check all that apply)
Group of answer choices
a. reduction in receptor-mediated endocytosis
b. synthesis of many extra secreted proteins.
c. mutation of a factor critical for degradation of proteins in the lysosome
d. mutation of a factor important for protein folding in the ER
Answer:
b. synthesis of many extra secreted proteins.
c. mutation of a factor critical for degradation of proteins in the lysosome
d. mutation of a factor important for protein folding in the ER
The conditions that would activate the unfolded protein response are:
Synthesis of many extra secreted proteins.Mutation of a factor critical for degradation of proteins in the lysosome.Mutation of a factor important for protein folding in the ER. What do you mean by unfolded protein response?The unfolded protein response may be defined as a cellular stress response related to the endoplasmic reticulum stress. It is a mechanism through which the accumulation of misfolded protein is induced.
Unfolded protein response gats are activated when there is any mutation or alteration that takes place in the ER, and sometimes lysosomes. Because these are both organelles that mediate the protein trafficking throughout the cell.
Therefore, the conditions that would activate the unfolded protein response are statements (b), (c), and (d).
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levels of biological organization from simplest to most complex?
Answer:organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.
Explanation:
Answer:
the biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.
Explanation:the biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.
How do the amounts of green
pigment, chlorophyll, differ from summer
to fall?
PLEASE ANSWER ASAP DUE IN 1 MIN!!!!!!!!!!!!!!!!!!!!!!
In a certain breed of cow the gene for red fur, R, is codominant with that of white fur, W.What would they be if you breed a red & white cow with a red & white bull?
A. G: 100% RW P:red and white cow
B. G:25 % RR 75% RW P: red
C. G:25% RR, 25% WW, 50% RW P: 1 red cow, 2 red and white cows, 1 white cow
D. G: 50% RR, 50% Rr P: all red cows
Answer:
D. G: 50% RR, 50% Rr P: all red cows
Explanation:
Malaria, a type of parasite, infects 500 million people each year by infecting the red blood cells of its host. The virus, HIV, that causes AIDS, reports 50,000 newly infected persons. Which statement best differentiates the pathogens, parasites and viruses?
options: Although both rely on other living organisms to survive, viruses are usually beneficial.
Although both rely on other living organisms to survive, parasites feed on the host organism.
Although both are living organisms, viruses break down dead plants and animals that other organisms use.
Although both are living organisms, parasites depend on the cells of living things to reproduce.
Answer:
The second statement clearly differentiates the pathogens best. Parasites feed on living host while viruses depend on the cells of other organisms to survive and reproduce as they cannot function outside a living host.
Although both rely on other living organisms to survive, parasites feed on the host organism. The correct option is B.
What are parasites?A parasite is an organism that lives on or in the host and obtains its food from or at the expense of the host.
Protozoa, helminths, and ectoparasites are the three main types of parasites that can cause disease in humans.
They frequently go unnoticed because they have few symptoms. However, these infections frequently result in serious illnesses such as seizures, blindness, heart failure, and even death.
A parasitic relationship takes place when one lifeform, the parasite, feeds on another organism, the host, causing harm and possibly death.
The parasite lives on or in the host's body. Tapeworms, fleas, as well as barnacles are examples of parasites.
Thus, the correct option is B.
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Identify Complete the figure by writing the location of each stage of cellular respiration
Answer: 1. Glycolysis takes place in the cytoplasm of both prokaryotic and eukaryotic cells. 2. mitochondrial matrix. 3. mitochondria
Explanation:
7. Show that it we cross pure grech pea plants with the heterozygous yellow pea plants
what are the possible phenistkes of the first filial generation by using rennut square
I use crosses the first filial generation on the question number seven (7) what are the
possible ration of their offspring's
9. What are the most commah known neuroplerans nictter are
Explanation:
7. 100% green pea plant
-50%=GG
-50%=Gg
9. Not sure what you mean?
Answer:
Yellow( heterozygous) and green
Explanation:
14. Which are the most common gases emitted by
volcanoes?
A. hydrogen and helium
B. oxygen and nitrogen
C. water vapor and carbon dioxide
D. chlorine and hydrogen
Answer:
The most common volcanic gases are water vapor and carbon dioxide
Explanation:
___ fill with the blood returning to the heart
Answer:
Im pretty sure its A
Explanation:
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If modern organisms have a lot of homologous structures, what inference
might paleontologists make about those organisms?
They are reptiles
The organisms have a common ancestor.
One organism evolved from the other
Answer:
The organisms have a common ancestor
Explanation:
Homologues structyres conclude that organisms of different species share structures, making them all have some sort of common ancestor
TRUE OR FALSE Nephrons located in the renal cortex and renal medulla.
The correct answer is true.
What causes leaves to change color in the Fall?
Answer:
Chlorophyll Breaks Down
But in the fall, because of changes in the length of daylight and changes in temperature, the leaves stop their food-making process. The chlorophyll breaks down, the green color disappears, and the yellow to orange colors become visible and give the leaves part of their fall splendor.
Explain why yam cannot follow cassava in a crop rotation plan
Answer:
The cassava cutting are placed in the sides of the mounds for yams
please I need help on it
Answer:
c) Symbiosis.........
In addition to deep sea organisms, there are many species found throughout the ocean. The numbers and relative proportions of Bacteria and Archaea change with depth in response to changing conditions. Viruses that infect the prokaryotic organisms play a variety of important roles in this habitat, including control of their overall numbers and facilitation of horizontal gene transfer. Choose whether each statement best describes bacteria, archaea, or viruses.
a. Most are inactivated by hydrolytic enzymes or sunlight,
b. Turnover in seawater is relatively rapid; the populations are replaced within a few days or weeks.
c. They are the predominant prokaryotes above 1000 m.
d. Most of these living below 1000 m are thought to be ammonia oxidizers.
e. Below 1000 m the most common phylum is Thaumarchaeota.
f. They increase to near 50% of total prokaryotes below 1000 m.
g. They are the most numerous biological entities in seawater.
h. A common genus is Pelagibacter.
i. Some types found in the photic zone carry out aerobic photosynthesis.
Answer:
The different sentences that belong to different groups are given as follows:
Bacteria
A common genus is Pelagibacter.
Some types found in the photic zone carry out aerobic photosynthesis.
They are the predominant prokaryotes above 1000m
Archaea
Below 1000m the most common phylum is Thaumarchaeota.
Most of these living below 1000m are thought to be ammonia oxidizers.
They increase to near 50% of total prokaryotes below 1000m
Viruses
Most are inactivated by hydrolytic enzymes or sunlight
Turnover in sea water is relatively rapid, the populations are replaced within a few days or weeks
They are the most numerous biological entities in seawater
The following are the statement that best describes the bacteria, archaea, or viruses individually.
What do you mean by Habitat?Habitat may be defined as a given set of environmental conditions which are favorable for organisms to survive better and reproduce.
Bacteria:
They are predominant prokaryotes above 1000 m. A common genus is Pelagibacter. Some types found in the photic zone carry out aerobic photosynthesis.So, the statements (c), (h), and (i) are true about bacteria.
Archaea:
Most of these living below 1000 m are thought to be ammonia oxidizers. Below 1000 m the most common phylum is Thaumarchaeota. They increase to near 50% of total prokaryotes below 1000 m.So, statements (d), (e), and (f) is true about Archaea.
Viruses:
Most are inactivated by hydrolytic enzymes or sunlight. Turnover in seawater is relatively rapid; the populations are replaced within a few days or weeks.They are the most numerous biological entities in seawater.So, statements (a), (b), and (g) are true about Viruses.
Therefore, above are the statements that best describe the bacteria, archaea, or viruses individually.
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1. Explain the advantages of compartmentalization in eukaryotic cells.
2. Explain how the nucleus controls protein synthesis in the cytoplasm.
3. List the components of the endomembrane system, and describe the structure and
functions of each component.
4. Describe the pathway of a newly synthesized protein through the endomembrane system
before is secreted out of the cell. What organelles will the protein visit?
5. Explain the biological/physiological relevance of mitochondrial cristae and chloroplast
thylakoids.
6. Describe the evidence that mitochondria and chloroplast are semiautonomous organelles.
7. Explain the mechanism by which microtubules transport vesicles through the cell.
8. Describe the basic structure of the plant cell wall and its function. Discuss the biological
relevance of plasmodesmata.
9. Compare and contrast the role of phospholipids and cholesterol in cell membrane
structure and function.
.0. Define diffusion. Explain why diffusion is a spontaneous process.
.1. Compare and contrast the role of transport proteins and receptor protein in cell
membrane function.
2. Define membrane potential and electrochemical gradient
3. Explain how endocytosis and exocytosis contribute to plasma membrane recycling.
4. Distinguish among osmosis, facilitated diffusion, and active transport.
15. Imagine that you can attach a molecular flag in the membranes of the rough endoplasmic
reticulum (RER). Where would you expect to find such flag if vesicles formed in the RER
deliver their content outside of the cell?
Answer:
Explanation:
⁰2
Nitrogen is important for creating both protein and carbohydrates.
True
False
Answer: This is true.
Find the type of mutation
Substitution, Insertion, Deletion?
Did the mutation change the reading frame?
Yes or No?
How did the mutation change the amino acid sequence?
1 amino acid change, Premature stop signal, All the amino acids are chabged after the point mutation?
Answer:
the number of members in A municipal corporation depends upon the _______ city
Unlike anorexics, bulimics
A) Often restrict calorie intake.
B) Are obsessed with being too thin.
C)
Can do damage to their health.
D) May appear to be normal in weight.
Answer: The answer is D.
Answer:
d is the closest to correct but honestly isn't completely true.
Explanation:
an anorexic can lose control sometimes and end up binging, making their weight loss less drastic or noticeable
helppppppppppppppppp meet plezzz
Answer:
50 percent is the anwer.
Help
(1)THE BEGGAR: (outside) Bread. Bread. Give me some bread.
(2)THE KING: Ah! He is crying out again. His voice seems to me louder than it was before.
(3) THE SERVANT: Yes! He seems quite hungry.
(4) THE KING: That is not my business.
(5)THE SERVANT: Should I not perhaps fling him a crust from the window?
(6)THE KING: No! To feed a beggar is always foolish. Every crumb that is given to a beggar is an evil seed from which springs another fellow like him.
The playwright includes the metaphor in paragraph 6 to -
A. convey the king’s reason for not giving away food to beggars B. highlight the king’s change of heart C. suggest that the king only cares for himself D. compare the bread requested to seeds from something evil
The _________________________ are responsible for packaging and distributing the materials in a cell. * Fill in the blank(s) with the correct answer.
Plant roots are more easily able to absorb ammonium that has been produced from
Answer:
the nector
Explanation:
rain results when water from the atmosphere condenses
Answer:
If it is true or false, that would be true.
Answer:
true
Explanation:
A genetic word is also known as a
Answer:
common
Explanation:
genetic means common
when a newly formed cell enters into interphase and begins conducting metabolic functions it's is. •G0 phase •G1phase •G2 phase •S phase
Answer:
Gap 1 (G1)
- This is the phase in which the cell undergoes normal growth and cell function synthesizing high amounts of proteins.
- The cell increases in size and volume as more cell organelles are produced.
- The cell can only move to the next phase, S after synthesizing enough ribosomes.
- As the phase is almost done, the mitochondria of the cell fuse into a network of mitochondria for effective energy production for cell processes.
- If the cell can not divide again, it enters the G0.
A genetic experiment with peas resulted in one sample of offspring that consisted of green peas and yellow peas.444167a. Construct a %confidence interval to estimate of the percentage of yellow peas.90b. It was expected that 25% of the offspring peas would be yellow. Given that the percentage of offspring yellow peas isnot 25%, do the results contradict expectations
Answer: a.) 0.2438 < p < 0.3028
b.) No
Explanation: Confidence Interval to estimate the percentage of yellow peas is calculated following these steps:
1) Total of the offspring in one sample:
n = 444 + 167
n = 611
2) Proportion of yellow peas, which is the number of yellow peas observed divided by the total of offspring:
p = [tex]\frac{167}{611}[/tex] = 0.2733
3) For a 90% confidence interval:
α = 1 - 0.90
[tex]z_{\alpha/2}=z_{0.05}[/tex]
Checking z-table, z-score will be: z = 1.645.
4) Calculate margin of error:
[tex]E=z.\sqrt{\frac{p(1-p)}{n} }[/tex]
[tex]E=1.645.\sqrt{\frac{0.27(1-0.27)}{611} }[/tex]
E = 0.0295
5) Confidence interval has boundaries:
p - E = 0.2733 - 0.0295 = 0.2438
p + E = 0.2733 + 0.0295 = 0.3028
Then, we are 90% confident that the percentage of yellow peas is between 24.38% and 30.28%.
b.) Since 25% is in the confidence interval, and we are 90% sure the true percentage of yellow peas are inside the interval, the result does not contradict the expectations.
True or False. As Finches move to a new island, random variation in the beaks/necks allowed
them to better compete for food. Over time the variations became adaptations and each
population became a different species uniquely adapted to its' food source. * *
(1 Point)
True
O
False
Answer:
true
Explanation: