Question 8 of 10
2 points
why do adults have stem cells?
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a. they are left over from earlier development.
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b. they are responsible for maintenance and repair.
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c. they replace organs that are worn out.
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d. they continue the growth of the body.

B)

Explanation:

The adult stem cell can renew itself and can differentiate to yield some or all of the major specialized cell types of the tissue or organ. The primary roles of adult stem cells in a living organism are to maintain and repair the tissue in which they are found.

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.