How do mutations lead to genetic variation?
a.
by changing the organism's appearance
b.
by producing random changes in an organism's genetic code
c.
by changing the way that the organism reproduces
d.
by changing the organism's behavior

answer:

b

explanation:

advantage of using stem cells in medical research:

1.       it provides medical benefits in the fields of therapeutic cloning and regenerative medicine.

2. it provides great potential for discovering treatments and cures to a variety of diseases including parkinson disease, spinal cord injuries, diabetes, alzheimer’s disease and many more.

3. limbs and organ could be grown in lab from stem cells and then used in transplant or treat illness.

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