Both walnut and Gingko trees lose their leaves in the fall when day length starts decreasing. Based on these observations, one may conclude that many tree species will lose their leaves in the fall in response to decreasing day length. This statement is an example of
A. a theory.
B. an experiment.
C. inductive reasoning.
D. deductive reasoning.
Answer: C
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Plant viruses may be transmitted by
A. worms. B. contaminated seeds. C. humans. D. insects. E. All of the choices are correct.
A researcher is looking for met- strains. He compares two plates. One plate has colonies growing on complete
medium. The other plate has colonies growing on methionine deficient medium. How can the researcher determine which colonies are met-?
a. The colonies growing on the methionine-deficient plate are met-. b. Colonies growing on complete medium but not on methionine-deficient medium are met-. c. More experiments must be performed to identify the met- colonies. d. All of the colonies growing on complete medium are met-. e. Colonies growing on methionine-deficient medium but not on complete medium are met-.
In tropical areas about ____% of the mangroves remain
a. 5 b. 10 c. 15 d. 35 e. 50
Select the one most appropriate choice for each
1. ___ glycolysis 2. ___ fermentation 3. ___ acetyl-CoA formation 4. ___ the Krebs cycle 5. ___ electron transfer phosphorylation A. produces NADH and CO2; changes pyruvate B. produces ATP, NADH, and CO2 C. splits glucose into two pyruvate molecules D. regenerates NAD+ as pyruvate is converted to ethanol or lactate E. uses a membranebound system that sets up production of ATP