Which microscope would be used for viewing bacteria?
A. electron microscope
B. compound microscope
C. dissecting microscope
D. a and b
E. a, b and c
A. electron microscope
B. compound microscope
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Which of the following is not a feature of a seed?
A. It contains a protective coat formed from the outer layers of ovule cells. B. The embryo is surrounded by nutritive tissue or has cotyledons that contain nutritive tissue. C. It contains a large percentage of water to support the embryo. D. It is a complex structure that allows the embryo to be dispersed to distant sites. E. Environmental signals such as light or temperature can trigger germination.
An ecologist that studies cycling of nutrients and the flow of energy between the biotic components of
an ecological community and the abiotic environments is a(n)______.
a. behavioral ecologist d. ecosystem ecologist b. population ecologist e. organismal ecologist c. community ecologist
Oxygen and carbon dioxide exchange between the circulatory system and tissues occurs at the
a. arteries. b. veins. c. venules. d. arterioles. e. capillaries.
The hydrologic cycle is different from other nutrient cycles in that
A) the atmosphere is involved. B) water is not recycled, but flows one way through ecosystems. C) the biotic part of the cycle plays only a small role. D) the soil is not involved. E) the ocean is involved.