Vertigo is a medical term used to describe feeling dizzy, as if everything is spinning. As it can severely compromise an individual's ability to walk or stand still properly, vertigo most likely indicates a problem with the person's
A) eardrum.
B) auditory canal.
C) pinna.
D) inner ear.

D.

Explanation:

The inner ear is important for balance.

I think it is A

Explanation:

Since vertigo makes you dizzy the eardrum inside of your ear it is like making a vibration of a bell

unicellular organisms, like bacteria, are able to perform all life functions within one single cell. multicellular organisms need many different types of cells to carry out the same life processes. each of these special types of cells has a different structure that it perform a specific function.

the correct answer is: b. pantala flavescens, because these organisms would have a high level of genetic variation due to sexual reproduction.  

because involves two organisms (parents) whose genetic material combines, sexual reproduction leads to genetic variation in new generations of offspring. the offspring is an unique organism, with new genome, more protected with the higher ability to adapted. this process is fundamental to evolution.