When a molecule is reduced, it _________
a. gains electrons
b. loses electrons
c. stores electrons
d. loses energy
e. burns energy
A
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The appendix is a vestigial structure that extends off of the ____
a. cecum b. colon c. duodenum d. rectum e. stomach
Male frogs give calls that attract female frogs to approach and mate. Researchers examined mating calls of closely related but separate species of tree frogs in South America
What outcomes could possibly occur where the ranges of two species overlap? I) The species will interbreed, eventually fusing over time. II) A stable hybrid zone will form if hybrids are better adapted to the area of overlap than either parent species is. III) Species will continue to diverge and be isolated by behavioral or genetic mechanisms. A) I B) II C) III D) I, II, and III
Network of DNA strands and associated proteins observed within a nucleus of a cell.
What will be an ideal response?
Endospores survive a variety of harsh conditions in part because of the presence of
A. mycolic acid. B. lipopolysaccharide. C. hopanoids. D. dipicolinic acid. E. glycoproteins.