Members of the ____ Lophotrochozoan phylum are acoelomate, dorsoventrally flattened,and do not have circulatory
or respiratory systems.
a. Rotifera
b. Mollusca
c. Platyhelminthes
d. Annelida
e. Nemertea
ANSWER: c
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Unrelated birds that nest in holes in trees produce eggs with white shells, as opposed to eggs with speckled or colored shells. This is an example of
A. polyploidy. B. ecological isolation. C. convergent evolution. D. range.
In humans, normal vision dominates color-deficiency, and both are X-linked. (The genes are located on the X chromosome.) A color-deficient male marries a woman who is heterozygous for normal vision. If they have a boy, the chance that he will be color-deficient is
A. 100%. B. 0%. C. 75%. D. 50%.
A cross between a black cat and a tan cat produces a tabby cat (black and tan fur together). What pattern of inheritance does this illustrate?
A.) sex-linked B.) multiple alleles C.) co-dominance D.) incomplete dominance
The amount of energy captured by plants and made available to consumers in an ecosystem is called
A) secondary trophic level. B) nutrient cycling. C) net primary productivity. D) energy pyramid. E) biological magnification.