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

Which region includes b cells, follicular dendritic cells and macrophages?

When did the Devonian period start and end?

Why aren't chromosomes always visible?

What are molecules that are both attracted to water and repel water called?

Which of the following is not a living thing? a. carbon dioxide b. an amoeba c. a daisy d. a jellyfish

Which is the most common type of muscle in the body?

What are monosaccharides made up of?

A virus is not considered a true living thing because it lacks one of the requirements of life. The ability to respond to stimuli The ability to reproduce The ability to grow and develop The ability to utilize a form of energy

What kinds of organisms require telomerase?

Suppose that a species of fish has split into two populations in a lake: one on the eastern side and one on the western side. How could you determine whether the two populations constitute different species? A.