CREB activates gene transcription in neurons that results in the formation of ________.

A) myelin sheath
B) dendritic spines
C) more receptors
D) All of the choices are correct.

Multiple sclerosis is a nervous system disorder that arises when white blood cells mistakenly attack and destroy ____.

A) neurons
B) ganglia
C) myelin
D) neuroglial cells
E) nerves

The evolutionary species concept states that for a population to be declared a separate species, it must:

A) not interbreed with any other population.
B) have diverged significantly from other populations.
C) occupy a different niche than any other population.
D) be morphologically different from any other population.
E) have undergone natural selection sometime in its history.

All of the following are parts of the anterior pituitary gland EXCEPT ________.

A) pars nervosa
B) pars distalis
C) pars intermedia
D) pars tuberalis

A cross of two medium height hybrid plants produces offspring that are dwarf, medium, and tall in a ratio of 1:2:1. This is an example of

A) variegation.
B) hybrid vigor.
C) incomplete dominance.
D) epistasis.
E) a polygenic trait.

According to Poiseuille's law, a small decrease in the diameter of a vessel will

A) dramatically decrease blood flow.
B) slightly decrease blood flow.
C) not affect blood flow.
D) slightly increase blood flow.
E) dramatically increase blood flow.

If one strand of DNA has the base sequence AAGCAA, the complementary strand has which of the following sequences?

A) UUCGUU
B) TTCGTT
C) AAGCAA
D) UTCGTU
E) TTCGTG

The radius is to the ulna as the

A) tibia is to the femur.
B) fibula is to the ulna.
C) fibula is to the tibia.
D) humerus is to the femur.
E) humerus is the radius.

The left coronary artery supplies blood to all the following EXCEPT ________.

A) interventricular septum
B) left ventricle
C) left atrium
D) right atrium

All commercially produced bananas are seedless because the plants that bear them are ____.

A) triploid
B) haploid
C) treated with colchicine
D) lacking ovaries
E) grown by tissue culture propagation