Which statement best describes why multicellular organisms have specialized systems? A. One system can do everything in the body.
B. All systems work separately from each other.
C. Systems fight against each other in the body.
D. Each system performs different functions that are necessary for life.

What role does differential reproduction play in natural selection? ! a) some organisms have different reproductive success due to nongenetic traits. b) some organisms have traits that them reach reproductive age. c) different methods of reproduction result in some organisms being genetically altered. d) reproduction varies among organisms due to pathogenic factors. the answer is not a or d based on other posts.

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?

Consider the classification levels of a human. eukarya ,animalia ,chordata ,mammalia ,primates, hominidae ,homo ,sapiens .which is the most specific taxonomic level in the classification system above? a sapiens b homo c hominidae d primates