The source of calcitonin is the
a. pituitary gland.
b. adrenal cortex.
c. adrenal medulla.
d. thymus gland.
e. thyroid gland.
E
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What is the leading cause of age-related blindness in the United States?
a. Macular degeneration b. Glaucoma c. Lack of focus d. Cataract e. Colorblindness
Which of the following explains why the owl
has its head almost upside down? a. Photoreceptors are concentrated near the bottom of the eye. b. Photoreceptors are concentrated near the top of the eye. c. Loud music from a passing car caused damage to the sense of balance. d. It is trying to remove water from its ear after a hard rain. e. None of these are an accurate explanation
Which of the following requires adenosine triphosphate?
A) Facilitated diffusion B) Simple diffusion C) Active transport D) Osmosis
Based on the figure below, what statement could you make about the development of human versus chimpanzee skulls. 
A. The human and chimp skulls develop similarly until adulthood, when human jaw development slows down relative to the chimpanzee. B. The human and chimp skulls develop similarly until the infant stage, when human cranium development slows down relative to the chimpanzee. C. The human and chimp skulls develop similarly until the infant stage, when human jaw development slows down relative to the chimpanzee. D. The human and chimp skulls develop similarly during the fetal stage, after which point chimpanzee cranium growth outpaces humans.