D
Embryonic stem cells are capable of self-renewal and unlimited differentiation.
Explanation:
An embryo is at the earliest stages in the growth and development of a higher organism. The cells of an embryo are pluripotent meaning that at the stage, they can differentiate into any type of cell of the organism. Therefore these cells are not determined and are referred to as stem cells. These cells are also self-renewing meaning that the cells can divide more stem cells.
Over time, these cells will begin to differentiate into tissues, organs, organ systems and ultimately into the whole organism. Some of the cells like the nerve,blood and muscle cells will also lose their self-renewal capacity.
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1. Frog 2. Alligator 3. Shark
Answer:
D would be the best answer here.
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Certain species like the tiger that are endangered are hunted because of things like their pelts and meat of the animal are very expensive and are very rare to find therefor people kill and sell them to get alot of money.
A shut down of normal testosterone production