The plants, animals, and microorganisms that live together constitute a:

An uncomfortable feeling in the ears when descending in an airplane is caused by changes in air pressure on the: a. inner ear b. middle ear c. eardrum d. hammer/anvil

In what locations does this text suggest you might find zooflagellates living? fresh water lakes on the surface of leaves inside other organisms on damp forest floors

Procedure in pregnancy to have access to fetus. what do you call this procedure?