Small amounts of hormones have large effects on an organism's physiology because the signals are amplified between glands and tissues in an endocrine axis and within the second messenger systems of individual cells
A. true
B. false
A
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Which virion release process is most often used by enveloped viruses?
A. Diffusion through channel protein B. Facilitated diffusion C. Budding D. Lysis
The responsible management (use and conservation) of the earth's resources indefinitely is called ________.
A. the maximum sustainable yield B. landscape ecology C. sustainable development D. carrying capacity
There are 40 individuals in population 1, all of which have genotype A1A1, and there are 25 individuals in population 2, all of genotype A2A2. Assume that these populations are located far from one another and that their environmental conditions are very similar. Based on the information given here, the observed genetic variation is mostly likely an example of
A) genetic drift. B) gene flow. C) disruptive selection. D) discrete variation. E) directional selection.
Genotypic and allele frequencies for a gene that determines neck length in giraffes are measured and found to be identical in three successive generations. From this data it is reasonable to conclude that, with respect to the gene for neck length, the population is in Hardy-Weinberg equilibrium.
a. true b. false