Which of the following components are part of
an ecosystem?
a. plants
b. animals
c. rocks and soils
d. plants and animals
e. plants, animals, rocks, and soil
E
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What functions as the supportive component of the skeleton in an animal with a hydrostatic skeleton?
A. a fluid-filled body cavity B. the circular muscles C. the longitudinal muscles D. the circular and longitudinal muscles E. the body wall
When a few individuals colonize a distant locality and start a new population, the allele frequencies of the gene pool
may be different than those in the original population. This is known as ____.
a. the founder effect b. a population bottleneck c. genetic equilibrium d. the Hardy—Weinberg principle e. natural selection
Describe the neurophysiological changes that are involved in long-term memory. What will be an ideal response?
Which of the following species was once considered so benign that microbiologists used it to trace movements of air currents in hospitals and over cities?
What will be an ideal response?