Answer:
c. Cells contain tiny organisms within them.
live fruit fly embryos, an organism for which they have lots of genetic tools. By combining genes involved in developmental pathways, they construct genetic circuits that are simple enough to behave predictably.
<span>Some 120 prescription drugs sold worldwide today are derived directly from rainforest plants. And according to the U.S. National Cancer Institute, more than two-thirds of all medicines found to have cancer-fighting properties come from rainforest plants. Examples abound. Ingredients obtained and synthesized from a now-extinct periwinkle plant found only in Madagascar (until deforestation wiped it out) have increased the chances of survival for children with leukemia from 20 percent to 80 percent.</span>
Answer:
Rainforest
Explanation:
Sunlight is a major limiting factor in the rainforest due to a very dense canopy created by taller trees and thus sunlight is blocked from reaching the rainforest floor making underbrush growth sparse. In rainforest, plant growth is confined to the surface due to limitations of light penetration as light intensity decreases with depth.