The accessory glands of the male are the:a
seminal vesicles only.
b. prostate gland only.
c. bulbourethral glands only.
d. seminal vesicles and prostate gland.
e. seminal vesicles, prostate gland, and bulbourethral glands.
E
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The evolutionary origin of mitochondria is demonstrated by which of the following key genomic characteristics?
A) variable numbers of protein-encoding genes B) large stretches of AT-rich DNA C) linear and circular genome structure in different organisms D) rRNA genes most closely related to Bacteria
Which of the following best describes the pathway an oxygen molecule would take through the human circulatory system?
A) systemic tissues ? alveoli ? pulmonary vein ? pulmonary capillaries ? systemic capillaries ? left ventricle ? left atrium ? aorta ? systemic arteries B) alveoli ? pulmonary capillaries ? pulmonary vein ? left atrium ? left ventricle ? aorta ? systemic arteries ? systemic capillaries ? systemic tissues C) alveoli ? pulmonary capillaries ? pulmonary artery ? right atrium ? right ventricle ? pulmonary vein ? systemic arteries ? systemic capillaries ? systemic tissues D) alveoli ? pulmonary vein ? pulmonary capillaries ? systemic capillaries ? left atrium ? left ventricle ? aorta ? systemic arteries ? systemic tissues
What category describes a species that, while not presently at risk of extinction, could likely be at risk of extinction in the near future?
A. A species of concern B. A threatened species C. An invasive species D. An endemic species
Tumor suppressors can oppose oncogenes by:
A. slowing cell division. B. repairing mutations. C. instructing defective cells to die. D. blocking the action of an oncogene. E. All of these choices are correct.