Living organisms are members of all of the levels listed below. However, soil is a component of ___
a. the community
b. the population
c. the ecosystem
d. both the population and ecosystem
e. both the community and the biosphere
ANSWER: c
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Which statement best describes fertilization in the moss life cycle?
a. Pollen is blown by the wind to a female cone, where it forms a pollen tube that grows toward where the egg will form. b. Flagellated sperm swim in a film of water on the surface of the plant to reach an egg. c. Flagellated sperm are blown by the wind to a location near an egg, and then swim through plant fluids to reach the egg. d. Flagellated sperm swim through plant fluids to reach an egg. e. Flagellated sperm attach to the moist skin of certain animals and are transferred to the surface of the plant to
When non-target species are caught they are called:
a. excess fish. b. undesirable species. c. ineffective fishing. d. incidental catch. e. secondary catch.
With regards to prokaryotes and eukaryotes, all of the following are true except
If each human lung contains about 300 million alveoli with a summed total surface area for gas exchange of 40 square meters, what is the approximate surface area of a single alveolus?
A. 750 square micrometers B. 133 square millimeters C. 7.5 square micrometers D. 7.5 square millimeters E. 0.133 square micrometers F. 1.33 square micrometers