. Imagine that you have been bitten by a poisonous snake with neurotoxic venom. Thankfully, you are rushed to the emergency room of a local hospital, where you receive antivenom. Your condition subsequently returns to normal. Before your release, your physician chastises you for not being more careful. He informs you that you were within minutes of not being able to breathe as the result of the venom's effect on the nervous control of your breathing. As a biology student, you consider this carefully, and hypothesize that your breathing would have stopped because the venom would cause
A. your trachea to collapse.
B. your lungs to collapse.
C. your diaphragm to become inactive.
D. your blood to lose oxygen.
C. your diaphragm to become inactive.
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Orgasm is necessary for
a. ejaculation of semen. b. pregnancy. c. erection. d. sexual arousal. e. all of these.
Which of the following leukocytes are classified as granulocytes?
a. monocytes b. lymphocytes c. macrophages d. natural killer cells e. neutrophils
Gamma irradiation is effective for sterilization because it
A) damages molecules irreversibly. B) is non-ionizing. C) penetrates well. D) destroys protein function, although DNA is undamaged. E) is penetrating and causes extensive molecular damage.
Which of the studies below provide evidence linking genes and behavior? (Check all that apply)
A. Mice that are lacking either the ephrinB3 or the EphA4 gene cannot walk normally, but instead hop like a kangaroo. B. Twin studies comparing monozygotic and dizygotic twins have found a high heritability for height, although environmental influences like nutrition also play a role. C. Fruit flies that are mutant for the genes dunce or rutabaga have impaired learning. D. Two lines of fruit flies were created by repeatedly selecting for high or low aggressive behavior. After multiple generations, the high line was reliably more aggressive than the low line.