In the case of temperature regulation, an example of an effector is
(a) a receptor in the brain.
(b) a center in the brain.
(c) a shivering skeletal muscle.
(d) none of the above.
(c) a shivering skeletal muscle.
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Examine the figure above, which shows indices of aquatic and terrestrial primary productivity. Based on concentrations of chlorophyll, primary productivity in the ocean
A. is uniform, since the ocean is a single continuous body of water. B. tends to increase with increase temperatures, from the poles to the equator. C. is greatest in the open ocean, due to less air pollution and cloud cover. D. is usually high in warm, tropical seas. E. tends to be high near polar regions, due to seasonal mixing that redistributes nutrients.
Which of the following illustrates viviparity?
a. A mare gives birth to a live colt b. A snake lays an egg right before it hatches c. A chicken lays an undeveloped egg d. A frog’s eggs are fertilized outside the body
Color blindness is an inherited disorder passed from ____________________ to child. What will be an ideal response?
Describe the condition of a neuron when it is not transmitting a nervous impulse-that is, when it is at rest.
What will be an ideal response?