What ecosystem has the highest rate of primary productivity?
a. savanna
b. agricultural land
c. algal beds and reefs
d. boreal forest
e. tropical rain forest
c
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Which energy association is correct?
a. Kinetic energy is energy of motion. b. Water stored behind a dam is an example of kinetic energy. c. Energy in the chemical bonds of a molecule is kinetic energy. d. Potential energy must be used immediately or it is lost. e. Light energy is a form of chemical energy.
What is the chemical reaction illustrated in the figure?
a. fermentation
b. the first step in the citric acid cycle
c. the energy investing phase of glycolysis
d. part of the electron transport chain
e. the energy capture phase of glycolysis
There are ________ species found in the basidiomycetes.
Fill in the blank(s) with the appropriate word(s).
Coronary arteries may become blocked
A. by a thrombus, producing a coronary thrombosis. B. and cause the formation of atherosclerotic lesions. C. as the direct result of angina pectoris. D. as the direct result of an infarct (area of tissue death) in the heart. E. All of these can block coronary arteries.