Which of the following is the most likely sequence of events, from earliest to most recent, in the evolution of sponges (organisms with many cells that have different functions)?
1) single-celled eukaryote
2) single-celled prokaryote
3) multicellular eukaryote
4) colonial eukaryote
a. 2, 1, 4, 3
b. 2, 1, 3, 4
c. 1, 2, 3, 4
d. 1, 2, 4, 3

What kind of seafood would you expect to have the highest levels of mercury and why? kelp, because they use the sun to photosynthesize on the bottom trophic level. oysters, because they filter feed on plankton on a lower trophic level. small fish, because they eat plankton on a higher trophic level. sharks, because they feed on organisms on a higher trophic level.

What do we call an individual that has inherited two identical alleles for the same trait? a.homozygous b.heterozygous c.monozzygous

Match the enzymes to their role in the dna replication process