Species richness and the relative abundance of
each species determine
a. the species composition of an ecosystem.
b. the species diversity of a community.
c. the species composition of a population.
d. the species diversity of a biosphere.
e. the species diversity in a niche
B
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Which one of the following is TRUE regarding the flow of energy through an ecosystem?
A) Energy flows from the sun to consumers and then to producers. B) Energy flows in multiple directions through an ecosystem. C) Energy is cycled through an ecosystem and rarely lost as heat. D) Energy flows from the sun to producers and then to consumers. E) As energy flows through an ecosystem, it does not change form.
What does water potential refer to?
a. a relative value that is defined in reference to distilled water at atmospheric pressure of 10 MPa b. a relative value that is defined in reference to pure water at atmospheric pressure of 10 MPa c. a relative value that is defined in reference to pure water at atmospheric pressure of 0 MPa d. a relative value that is defined in reference to distilled water at atmospheric pressure of 0 MPa
when its cold, the __ contracts and draws the testes closer to the body to keep them warm
Fill in the blank(s) with the appropriate word(s).
Which of the following would tend to promote adaptive radiation?
A) An organism has a very stable set of features and capabilities over long spans of evolutionary time. B) An organism colonizes an isolated area that is habitable but relatively devoid of life. C) An organism colonizes an area that already has a high level of existing species diversity. D) A single species goes extinct, but it has several competitors that quickly expand to assume its ecological roles.