The growth rate
a. does not vary from one species to another.
b. is controlled best through non-biological mechanisms.
c. is controlled by the frequency of assisted reproduction.
d. is controlled by the number of offspring produced.
e. does not vary as a result of density-dependent controls.
D
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Answer the following statements true (T) or false (F)
1. Gamma aminobutyric acid (GABA) is the most common inhibitory neurotransmitter in vertebrates. 2. Ionotropic receptors act by activating G proteins in target cells. 3. Metabotropic receptors act by initiating changes in second messenger systems in target cells. 4. Meningitis is solely a bacterially caused disease. 5. Synaptic vesicles discharge their contents at the axon hillock region.
The use of the suffix "ase" on a word denotes a(n)
A. substrate. B. product. C. enzyme. D. electron acceptor. E. substrate AND electron acceptor.
Altruistic behavior ____
a. works in a similar way to selfish herds b. is sexually directed behavior c. is self-sacrificing behavior d. is aggressive behavior e. is nonreactive, such as freezing at the sign of danger
What condition is necessary for genetic drift to have a significant effect on a population?
a. A natural disaster must occur. b. The population needs to be small. c. A portion of the population needs to migrate. d. Mutation must occur. e. Gene flow must occur.