What structure protects the embryonic shoot of many monocots?
a. coleoptile
b. hypocotyl
c. cotyledon
d. endosperm
e. radicle
ANSWER: a
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A. -ssRNA B. dsDNA C. dsRNA D. DNA:RNA hybrid
RNA molecules are usually found as
a. a two-stranded double helix. b. a single strand with some folds and twists where the strand bonds with itself to make some double-helical regions. c. part of a pair with a single DNA strand. d. a single strand that has no double-helical regions. e. an extra strand joined to a DNA double helix.
He believed that disease had natural causes, e.g., "The Four Humor Theory". and that it could be cured by rational methods.
A. Imhotep B. Asclepius C. Hippocrates D. Fracastoro
Hominin fossil footprints that are obviously bipedal date to about ________ years ago
A) 50,000 B) 100,000 C) 3.6 million D) 12 million