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Usimov [2.4K]
3 years ago
5

When does cell differentiation occur? Question 1 options: when cells express the same gene when cells express different genes wh

en cells express all genes when cells do not express genes
Biology
1 answer:
serg [7]3 years ago
5 0

Answer:

The answer is when the cell express different genes.

Explanation:

Cell differentiation is the process when a cell is changed from one cell type to an other and brings more complexity to the system. A cell before differentiation possess all the genes however their expression in turned off. When some external or internal factors trigger the gene expression it starts the cell differentiation. A multicellular organism undergoes several rounds of cell differentiation during its development. Although cell differentiation changes the size, shape and metabolic activity but the genetic makeup or DNA is never changed during cell differentiation.

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When Charles Darwin published his radical theory of evolution by natural selection in 1859 it was attacked by many early biologi
irina1246 [14]

Answer:

Empirical evidence of his ideas

Explanation:

The scientific process involves the formulation of hypotheses that enable to answer questions about the real world, and then to carry out experiments or observations that are used to confirm (or reject) such predictions. In the last 160 years, Darwin's ideas on 'descent with modification' have constantly been subjected to experimental assessment, and obtained data confirmed his observations. For example, molecular evidence based on the DNA and RNA -which constitute the genetic material of all living organisms- has shown the conservation of this process. In consequence, molecular evidence has been used to construct 'evolutionary' phylogenetic trees from DNA/RNA sequences. Moreover, evidence in genetics has shown the critical role played by mutations in the mechanism of natural selection proposed by Darwin, thus also confirming his theories. These are only some examples, and supporting evidence confirming Darwin's ideas has been collected from different research fields ranging from ecology to molecular biology.

6 0
3 years ago
Physical differences between the jaws of the gorilla, Australopithecus, and modern human?
katrin [286]
The angle of jaw and type of teeth in each jaw are the main big differences.
7 0
3 years ago
A cutting is taken from a red-flowered geranium and placed in water to develop roots. Once roots have grown, the new plant is pl
Simora [160]

Answer:

oh fella I have given you the answer it is A sexual (take care bye)

3 0
3 years ago
What happens to the speed of light as it moves from:<br> a.Gas to a solid?<br> b.Liquid to gas?
Hoochie [10]

Answer:

A

Explanation:

I think its A but it can also be made to condense into a liquid

4 0
3 years ago
How will you investigate a change in velocity affects the velocity of the two carts after the collision if the objects do not st
Nutka1998 [239]

P = mv

This is a momentum question:

Momentum is always conserved so the momentum before and after a collision must be equal so:

The velocity of the two objects after they collide and dont stick together if no KE is lost is dependent on the mass of each of the objects by:

m_{1} v_{1i} + m_{2} v_{2i} = m_{1} v_{1f} + m_{2} v_{2f}\\

Where i is initial and f is final meaning before and after the collision

8 0
3 years ago
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