This illustration shows a kind of animal that is a free-living organism.

what is the common name of the group that contains this organism?

a.
ribbon worms

b.
arthropods

c.
flatworms

d.
roundworms

In a cladogram, what occurs at a node? a derived trait appears. evolution is stopped. an ancestor dies. the cladogram ends. aa as s as ss what are the chances that their offspring will have sickle cell anemia? 0% 25% 50% 100%

Which enzyme is responsible for “unzipping" the dna by breaking the hydrogen bonds between the nucleotides?

Examine the following diagram. place the labeled layers in order from youngest to oldest.