The role of active cytotoxic T cells is to attack . a. body cells that have been infected b. extracellular viruses and bacteria circulating c. antibodies circulating proteins d. complement proteins

According to the cladogram, which organisms have roundworms as a common ancestor?

In a population that is in hardy-weinberg equilibrium, there are two possible alleles for a certain gene, a and a. if the frequency of allele a is 0.4, what fraction of the population is heterozygous? a. 0.40 b. 0.60 c. 0.16 d. 0.48

Veronica and her little sister, monique, are playing on a seesaw. if veronica weighs 75 pounds, and monique weighs 60 pounds, which statement is true?