Key functions of neurons are

A) sensing the environment, but not responding to it.
B) responding to the environment with a behavior, but not sensing it.
C) sensing the environment and responding with a behavior.
D) sensing the environment, responding with a behavior, and adapting to the environment.

Transposons are transposable elements in the DNA because

A) they transport genetic information.
B) they transfer organelles inside a cell.
C) they transmit signals in the cell indicating the genes to be copied.
D) they move from one location to another in the DNA.
E) they cause the DNA to take on a specific shape or pose.

A researcher discovered a sensory receptor that detects decreasing oxygen concentrations in the blood. According to the principles of negative feedback, it is likely that stimulation of this sensory receptor will produce which of the following types of responses?

A) A decrease in heart rate
B) An increase in the respiratory rate
C) An increase in physical activity
D) Unconsciousness
E) Both a decrease in heart rate and an increase in the respiratory rate will occur.

In a study on mate choice, men and women were able to spend "mate dollars" on traits they desired in a life partner. With a limited budget, women spent 17% of their money on yearly income, compared to only 3% spent by men on the same trait. Thus, women seem to prefer men that can provide direct, material benefits. Which hypothesis for this preference is based on direct benefits of female mate choice?

A) A wealthy man can provide assistance for her relatives and their offspring, thereby providing an indirect fitness benefit.
B) A man's wealth is indicative of his intelligence, and therefore he will likely produce offspring that are also intelligent.
C) A wealthy man can provide more parental care and resources to care for his offspring.
D) A wealthy man benefits his or her society by providing assistance to individuals otherwise likely to be a burden to the group.

Which of the following is NOT a long-term regulator of blood pressure?

A) Renin-angiotensin-aldosterone mechanism
B) ADH mechanism
C) Stress-relaxation response
D) Oxygen tension response

What is the microtubule arrangement of a flagellum or cilium?

A) 9 x 1 array
B) 9 + 1 array
C) 9 x 3 structure
D) 9 + 2 arrangement
E) 9 + 3 arrangement

Olfactory adaptation occurs when odorant receptors become ________.

A) saturated
B) destroyed

Sperm mature within the

A) prostate gland.
B) vas deferens.
C) seminal vesicles.
D) ejaculatory duct.
E) epididymis.