If you were a conservation biologist at a time before the woolly mammoths went extinct and could influence the survival of certain lineages depicted in the figure above,
which of the nodes labeled a through f on the figure below would you let go extinct so that you could use your resources to assure the survival of the lineages derived from the remaining nodes?
a. node e c. node c
b. node f d. nodes d, or e, or f
D
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Based on the outcome for plants, a monkey eating a banana is a
A. pollinator. B. fertilizer. C. disperser. D. parasite.
Side A is ____ to side B
a. hypertonic b. hypotonic c. isotonic d. either isotonic or hypertonic e. either isotonic or hypotonic
Mary is a long-distance runner and trains regularly. Recently, Mary and her husband have unsuccessfully tried to conceive a child. To improve her chances of getting pregnant, why does her doctor suggest that she should stop training?
A) Low levels of body fat may lengthen the menstruation cycle. B) Low levels of body fat may cause menstruation to cease. C) Low levels of body fat may lead to excessive levels of estrogen and progesterone. D) Low levels of body fat may increase fat deposition, thereby decreasing fertility.
The UV light affects the nucleotide bases of DNA. What can UV light form, and how many neighbouring bases of DNA become covalently linked in this situation?
a. It can form a primer with two bases linked. b. It can form a dimer with one base linked. c. It can form a trimer with three bases linked. d. It can form a dimer with two bases linked.