Speciation Can Reveal Traits That Cause Reproductive Isolation

question 12

Multiple Choice

Speciation can reveal traits that cause reproductive isolation. These traits

• A)can include a change in one gene or in a small number of genes.
• B)can include a change in a large number of genes and gene interactions.
• C)don't depend on genetic variation as long as geographic variation is maintained.
• D)depend on sexual selection.
• E)A and B

---

Definitions:

Facial Nerve

The seventh cranial nerve that controls the muscles of facial expression, taste sensations from the anterior two-thirds of the tongue, and the secretion of saliva and tears.

Vagus

Referring to the tenth cranial nerve (vagus nerve), which is part of the parasympathetic nervous system and controls functions of the heart, lungs, and digestive tract.

Ptosis

Falling down of an organ—for example, the drooping of the upper eyelid.

Oculomotor Nerve

The cranial nerve III, responsible for controlling a majority of eye movements, pupil constriction, and keeping the eyelid open.