The different chipmunk species correspond to the different tree species along an elevational gradient. This is likely because
A) each chipmunk species depends on the specific tree species for habitat.
B) lodgepole trees and lodgepole chipmunks prefer warmer temperatures.
C) the fundamental niche of yellow-pine chipmunks is limited to middle elevation.
D) several resource factors for both groups change with elevation.
D
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The hormone that stimulates liver cells to release stored glucose is
A. insulin. B. calcitonin. C. aldosterone. D. glucagon. E. melatonin.
Although all human beings have unique sets of DNA
sequences, about __________ percent of human DNA is the same for all humans. a. 50 b. 60 c. 75 d. 90 e. 99
The geographical distribution of hominids changed
dramatically during the Pleistocene due to the migrations of a. Australopithecus robustus. b. Australopithecus boisei. c. Homo erectus. d. Homo habilis. e. Homo sapiens.
Which of the following names is incorrectly matched with their discovery?
a. Beijerinck and Winogradsky—Gene therapy b. Lancefield—Classification of streptococci c. Watson and Crick—Structure and replication of DNA d. Avery, MacLeod, McCarthy—DNA was the hereditary material e. Lederberg and Tatum—Transfer of genetic material via conjugation