Adding an organism to a food chain does not affect the other members of the food chain, but removing an organism does. true or false?

What are the four basic classes of organic molecules how do they differ structurally and functionally

Which best describes a rhinovirus? o a. a virus that causes a common cold o b. a protective shell around a virus o c. a tube the comes off a virus o d. a piece of dna transferred by a virus

In natural selection, what is actually “selected? ” a) alleles are directly selected b) genotypes are directly selected c) phenotypes are directly selected d) entire populations are directly selected