How do you think scientists determine the population size of fish?

Because we can't see and count all the fish, scientists collect data from multiple sources. ... They then feed these data into computer models to generate assessments of the population as a whole.

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.