During the mid 1930s, G. F. Gause studied competition among three species of Paramecium. Through his experiments, he formulated a principle of
A. interspecific competition.
B. metapopulation fluctuation.
C. niche overlap.
D. exploitative competition.
E. competitive exclusion.
Answer: E
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Twenty different types of amino acids are used to make proteins
a. True b. False
One disadvantage in excreting urea rather than uric acid is that:a
urea is more toxic than uric acid. b. urea is less toxic than uric acid. c. urea is excreted by respiratory structures. d. urea requires more water for excretion. e. urea is produced from ammonia, not nucleic acids.
Fenway Park, home of the Boston Red Sox, is situated on land that was once a fen, a kind of wetland. The replacement of the fen is an example of
A) pollution. B) overexploitation. C) habitat destruction. D) competition.
Please choose the one BEST response for each.
A. neuroglia B. detects a stimulus C. both receives and sends signals from other neurons D. neurotransmitter molecule E. controls muscles and glands F. sodium-potassium pump G. gray matter H. voltage difference across a cell membrane I. voltage difference across a cell membrane that is not receiving stimulation J. dendrite K. brief reversal of the voltage difference across a cell membrane L. a response intensifies the conditions that caused its occurrence M. neuron membrane potential at which gated sodium channels open N. electroencephalography O. positron-emission tomography