If their populations go up or down, it changes the populations of many other organisms. In your food web, ( Fish eggs, sea gulls, anchovy, elephant seals, dolphins, crabs, jelly fish, wild shrimps) which organism (one or more) would have this effect on the others. Be sure to explain why.

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.

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.

well, i believe that the answer is 2. : 3