CO2 is a greenhouse gas because it:
A) increases the heat capacity of the stratosphere.
B) causes the destruction of ozone in the near-surface atmosphere.
C) traps short-wave energy near Earth's lower atmosphere.
D) traps long-wave heat energy near Earth's lower atmosphere.
E) increases the reflection of short-wave energy from the sun.
Answer: D
You might also like to view...
Pufferfish (Fugu) are a delicacy in Japan, but must be cleaned very carefully as their liver contains tetrodotoxin which blocks voltage-gated Na+ channels. Imagine you are testing for the presence of this toxin using a neuron in a dish. You apply an electrical stimulus to the neuron that should produce an action potential. What will you observe if tetrodotoxin levels are high enough to block the
neuron's voltage-gated Na+ channels? A. The neuron will exhibit a slow depolarization even before the stimulus is applied and then a normal action potential. B. The neuron will exhibit a slow hyperpolarization even before the stimulus is applied. C. The neuron will show a normal resting potential, but not exhibit depolarization when the stimulus is applied. D. The neuron will depolarize and exhibit rapid depolarization, but will not repolarize. E. The neuron will depolarize normally, but then become hyperpolarized such that the membrane potential is much lower than usual.
Which equation best describes the relationship between ion gradient and equilibrium potential for that ion?
A) steady-state B) Goldman C) Nernst D) Hodgkin E) Katz
The evolution of horses is best characterized as ____
a. a linear sequence of intermediate forms leading to modern horses b. an example of evolutionary convergence c. poorly documented and speculative d. a gradual increase in body size e. a complex branched history with many extinct lineages
Suppose that the bottom of an ocean floor is disrupted, and bits of algae along with other bottom-dwelling microorganisms are scattered about into the ocean water. Which organism would be able to take the best advantage of this temporary food source?
A) sponges B) cnidarians C) parasitic flatworms D) soil-dwelling nematodes