19th-century naturalists tried to reconcile traditional
beliefs with physical evidence of __________. Fill in the blank(s) with the appropriate word(s).
Answer: evolution
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Sodium-potassium pumps increase the charge gradient across the neuron membrane by moving ________
a. one potassium ion into the cell and one sodium ion out b. two potassium ions into the cell and three sodium ions out c. three potassium ions into the cell and two sodium ions out d. two potassium ions and three sodium ions out of the cell
Which zone of the ocean is found above the
continental shelf? a. abyssal b. benthic c. pelagic d. neritic e. oceanic
Each enzyme has a particular substrate because enzymes
A. have active sites complementary in shape to their substrates. B. are named for their substrate. C. decrease the productivity of the cell. D. always require coenzymes. E. increase the energy of activation.
Which organism would be found at the top of a lake biomass pyramid?
a. algae b. rooted plants c. invertebrates d. small fish e. large-mouth bass