Under what conditions do photosynthesis and cellular respiration occur in plants?
A) Photosynthesis and cellular respiration occur only in the light.
B) Photosynthesis occurs only in the light, and cellular respiration occurs only in the dark.
C) Photosynthesis occurs only in the light, and cellular respiration occurs in both the dark and the light.
D) Photosynthesis and cellular respiration occur in both the dark and the light.
Ans: C) Photosynthesis occurs only in the light, and cellular respiration occurs in both the dark and the light.
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A. biosynthesis. B. respiration. C. biogeochemical weathering. D. photosynthesis. E. fermentation.
A bean pod is
a. a seed container. b. a fruit. c. a part of the stamen. d. both a and b.
Scientists have a complete fossil record showing the evolution of horses over millions of years, with the legs becoming longer and the teeth larger, as ancestors of the modern horse adapted from living in forest to grasslands. This is an example of
A. punctuated equilibrium. B. extinction. C. a postzygotic barrier to evolution. D. gradualism. E. a prezygotic barrier to evolution.
How many biological safety levels are there?
A. 5 B. 2 C. 4 D. 8