In an organism with 52 chromosomes, how many bivalents would be expected to form during meiosis?
A) 208 B) 13 C) 26 D) 52 E) 104
C
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Which of the following adaptations are LEAST likely to be found in plants which regularly experience dry, hot conditions?
A) CAM plants that grow rapidly B) small, thick leaves with stomata on the lower surface C) a thick cuticle on fleshy leaves D) large, fleshy stems with the ability to carry out photosynthesis E) plants that do not produce abscisic acid and have a short, thick taproot
A ring species is one where
a. a clinal variation occurs. b. all of the various populations can successfully mate in nature. c. an area's climate interferes with speciation. d. none of the various populations can successfully mate in nature. e. only intermediary populations can mate successfully.
What term describes the birth of a baby buttocks first?
A) placental stage B) labor C) breech birth D) blue baby
Cavitation can occur when what happens?
A. Root pressure pushes water up the xylem. B. Starch grains block the sieve tubes. C. Gas bubbles expand inside a tracheid or vessel member. D. Stomata get stuck closed. E. Clouds block sunlight shining on the leaves.