The wet-nose and cleft upper lip of the _____ does not allow these primates the range of facial expressions and
vocalizations observed in the anthropoids.
a. orangutan
b. lemur
c. spider monkey
d. gorilla
e. human
ANSWER: b
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Male Australian bowerbirds build and decorate elaborate structures, called bowers, out of grasses and other vegetation. If we want to understand how this behavior promotes a male bowerbird's ability to survive and reproduce, we want to understand its:
A. causation. B. development. C. adaptive function. D. evolutionary history. E. genetic basis.
The "one gene–one enzyme" hypothesis of George Beadle and Edward Tatum was an oversimplification because:
A. mutations may not completely inactivate an enzyme. B. some enzymes contain more than one polypeptide. C. some enzymes can be phosphorylated. D. auxotrophs can be corrected. E. some RNAs are independently catalytic.
Which of the following is not a threat related to the Klamath-Siskiyou ecoregion?
a. logging b. declining populations of spotted owls c. oil and gas development d. a newly introduced pathogen
Thymine dimers directly interfere with translation.
A) True B) False