A new organism is discovered in the forests of Costa Rica. Scientists there determine that the polypeptide sequence of hemoglobin from the new organism has 72 amino acid differences from humans, 65 differences from a gibbon, 49 differences from a rat
, and 5 differences from a frog. These data suggest that the new organism is more closely related to _____. A) humans than to frogs
B) frogs than to humans
C) rats than to frogs
D) gibbons than to rats
B
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A Class 4 hurricane is centered over Bermuda (latitude 32.20 N) and is moving eastwards. Which coastal city on the eastern coast of the United States is in the most peril from its approach?
a. Savannah, GA (latitude 32.08 N) b. Jacksonville, FL (latitude 30.32 N) c. Wilmington, NC (latitude 34.23 N) d. Boston, MA (latitude 42.36 N)
One of the disadvantages of exoskeletons in arthropods is that:A
they severely limit locomotion. B. they interfere with ingestion. C. they must be shed when the animal grows. D. they do not provide adequate protection from predators. E. they do not prevent desiccation
The two strands of DNA are held together by hydrogen bonds
Indicate whether the statement is true or false
Mutation rates:
A) are equal in all species; this is why we can accurately calibrate a molecular clock. B) can be synonymous or non-synonymous. C) tend to be higher in E. coli than in Homo sapiens. D) can be affected by environmental factors. E) are generally unimportant in evolution.