During photosynthesis, high-energy carbohydrates are produced at the end of
A) light absorption by chlorophyll.
B) cellular respiration.
C) the light reactions.
D) the Calvin cycle.
E) the electron transport pathway.
D
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Different ratios occur in crosses with single gene pairs or two gene pairs. What types of ratios are likely to occur in crosses dealing with a single gene pair?
A) 9:3:3:1, 1:2:1 B) 1:1:1:1, 1:4:6:4:1 C) 3:1, 1:1, 1:2:1 D) 4:1, 1:1, 1:4:1
Evolution that involves changes in allele frequencies over just a few successive generations is referred
to as: a. natural selection. b. microevolution. c. macroevolution. d. stabilizing selection. e. directional selection.
Which is NOT a feature found in protozoans?
A. usually motile B. eukaryotic C. multicellular D. heterotrophic
A species whose absence would bring about major changes in a community is called a ________
Fill in the blank(s) with correct word