The part of the ear where sound wave compressions and rarefactions cause the eardrum to vibrate is the
a. inner ear.
b. middle ear.
c. outer ear.
d. auditory nerve.

The question is asking essentially about the location of the eardrum: if it asks where it is that eardrum vibrates, then it is also asking where there eardrum is located: and this is is in the middle ear: answer b.

What is the difference between cytokinesis in plant and animal cells? animal cells dived by a cleavage furrow. plant cells divide by a cell plate that eventually becomes the cell wall. cytoplasm and cell membranes are necessary for cytokinesis in both plant and animals.