1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
erma4kov [3.2K]
3 years ago
10

Stem cells are undifferentiated cells that have the ability to continue to grow and divide in their non-specialized state for lo

ng periods of time. Although the genes found within the stem cells are the same, stem cells differentiate into unique cell types (e.g., muscle cells, nerve cells, skin cells, etc.) due to a. random segregation and proliferation.b. meiotic division and fertilization.c. mutations in their genetic code.d. different patterns in their gene expression.
Biology
1 answer:
strojnjashka [21]3 years ago
4 0

Answer:

The correct answer will be option-D

Explanation:

Stem cells are the cells which have the ability to form different types of cells. They differentiate and specializes to perform different functions in the body and thus forms the different cells.  

The differentiation and specialization are controlled at the gene level by different patterns of gene expression. The pattern of gene expression is not fully understood during development but research have shown that the gene expression is influenced by the different environmental signals and internal regulators.

Thus, option-D is the correct answer.

You might be interested in
Which are units used to express volume
Harman [31]
The answer is cubic meter c:
3 0
4 years ago
What is true of marriage in India
enyata [817]
Marriage in India is normally arranged by parents of the groom/bride.
5 0
4 years ago
-
fiasKO [112]

Explanation:

-Pheophytin

P680 the primary donor of Photosystem II becomes excited and transfers an electron to pheophytin. Pheophytin is the initial intermediate electron acceptor and carrier in Photosystem II; it is a chlorophyll-like molecule that lacks a central magnesium ion.

Further Explanation:

Photosynthesis is a chemical pathway that’s integral to producing energy in plants and other primary producers. Energy in the form of molecules of glucose is produced from light, water and carbon dioxide while oxygen is released. This occurs in several complex steps, photosynthesis is a rate limited reaction, depends on several factors including carbon dioxide concentration, ambient temperature and light intensity; the energy is retrieved from photons, I.e. particles of light, and water is used as a reducing agent. This occurs in the thykaloids, where pigment molecules like chlorophyll reside.

The chloroplast is a membrane bound organelle found in plants. It contains several invaginations of a plasma membrane called the thylakoid membrane. This contains chlorophyll pigments, in stacks called granum, while the internal spaces of the organelle are called the lumen. Liquid surrounds the granum, forming the stroma.

During the light reaction:

  • Light is absorbed by pigments in phosystem II (PSII). This energy is transferred among pigments til it gets to the reaction center, and is transferred to P680; this promotes an electron to a higher energy level where it then goes to an acceptor molecule, like Pheophytin .
  • Water supplies the chlorophyll in plant cell with replacement electrons for the ones removed from photosystem II. Additionally, water (H2O) split by light during photolysis into H+ and OH- acts as a source of oxygen along with functioning as a reducing agent.
  • the electron moves down an electron transport chain (to PS I)where it experiences continuous energy loss. This energy fuels the pumping of H+ from the stroma to thykaloid, leading to the formation of a gradient. The H+ move along their gradient and cross through ATP synthase, into the the stroma.
  • ATP synthase converts ADP and Pi to the energy storage molecule ATP.
  • The electron gets to photosystem I where it goes to pigments at P700. It absorbs light energy, the electron is promoted to a higher energy level, and passed to an electron acceptor. This leaves a space for another electron which is then replaced by one from photosystem II.
  • in the ETC, the molecule NADP is reduced to NADPH by providing H+ ions. NADP and NADPH are integral to the Calvin cycle where monosaccharides or sugars like glucose are produced after the modification of several molecules.

Learn more about Photosynthesis at brainly.com/question/4216541

Learn more about cellular life at brainly.com/question/11259903

#LearnWithBrainly

8 0
3 years ago
What usually happens when new evidence is discovered that is not already explained in an existing theory? Group of answer choice
meriva

Answer:

The best answer to the question would be - The theory is adapted to account for the new evidence.

Explanation:

If a piece of new scientific evidence is discovered for an already existing scientific theory that is already not explained in the theory it would be lead to the modification of the theory in order to make the theory so it can explain the newly find evidence.

If the theory can not be modified to fit the new scientific evidence the given theory is rejected ultimately. But more often theories are modified to explain the newer findings.

Thus, the best answer to the question would be - The theory is adapted to account for the new evidence.

6 0
3 years ago
The subdivision of the peripheral nervous system that consists of nerves that control all of the involuntary muscles, organs, an
antoniya [11.8K]

Answer:

The Autonomic Nervous System is that part of PNS consisting of motor neurons that control internal organs. It has two subsystems. The autonomic system controls muscles in the heart, the smooth muscle in internal organs such as the intestine, bladder, and uterus.

7 0
3 years ago
Other questions:
  • The center of bone that is responsible for making red blood cells is called ______.
    10·2 answers
  • Hypothesize what potential impact a mutated EGFR allele will have on a cell. Give one possible impact and explain your answer.
    14·1 answer
  • Scientists have discovered convection currents inside Earth. Explain how these convection currents move and what layer(s) they o
    9·1 answer
  • Plzzzzzzzzzzzzzzzzzzzzzzzzzzz help ethan hunt
    7·2 answers
  • Which is one characteristic of polar climates that highland regions do not have? O a treelin cold temperatures O very little pre
    7·2 answers
  • Please help guys
    14·1 answer
  • In a cell, proteins are made on the
    13·2 answers
  • Before entering the Krebs cycle, an intermediate molecule bonds to a 2-carbon molecule. This intermediate complex enters into th
    9·1 answer
  • 5. What would happen if all of the bird types in this activity flew to an island where no birds had
    6·1 answer
  • Which equation is correct according to ohm’s law? r = vi v = i over r. r = i over v. v = ir
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!