Which adaptation(s) allow(s) a rattlesnake to locate prey more effectively?
a. acute sense of hearing only
b. heat and chemical sensors
c. acute sense of smell only
d. acute sense of vision and chemical sensors
e. acute sense of smell and vision
ANSWER: b
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A fruit is a mature:
A. ovary. B. ovule. C. stigma. D. stem. E. pollen grain.
The figure shows a simplified phylogeny of closely related species of primates. This tree was proposed by comparing DNA sequence changes in the gene for cytochrome oxidase subunit II. The vertical scale represents time and the branch points represent common ancestors. What species did ancestor B give rise to?
A. Siamangs and orangutans.
B. All of the species except orangutans.
C. All of the species except siamangs.
D. All of the species except siamangs and pigmy chimps.
Which of the following is an example of a
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