The part of a lake where light does not penetrate is the
Select one:
a. littoral zone.
b. benthic zone.
c. pelagic zone.
d. profundal zone.
e. limnetic zone.
d. profundal zone.
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Rats learning to press a lever to receive food is an example of
A. avoidance. B. operant conditioning. C. habituation. D. classical conditioning. E. negative reinforcement.
Both fermentation and aerobic respiration begin with ________
a. electron transfer from NADH to pyruvate b. the Krebs cycle c. an electron transfer chain d. glycolysis
Research on memory indicates that
a. short-term memory is a product of chemical changes in neurons. b. long-term memories are lost more frequently. c. long-term memory is limited to a few years' duration. d. long-term memory retention is better for skill memory than for declarative memory. e. short-term memory is limited to several hundred bits of information.
Gene regulation in eukaryotes is _______ complex than in prokaryotes
Fill in the blank(s) with the appropriate word(s).