The process of squeezing food through the digestive tube by contractions of the outer wall is:
a. digestion
b. enzyme action
c. peristalsis
d. hydrolysis

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

Individuals do not compete directly for resources, but are prey for the same predator

Which best example best demonstrates the importance of having knowledge of evolutionary relationships? a. illustration of a plant b.organ transplantation between species c. blood donation from a human d. do you need sequence of an insect.