MicroRNA affect gene expression by __________ mRNAs
a. destabilizing
b. splitting
c. stabilizing
d. none of the above
Answer a
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A study comparing Japanese and American facial expressions found that __________.
A) the two had similar expressions in public, but the American participants were more expressive when they thought they were alone B) participants of both cultural groups were careful to mask their feelings in front of authority figures C) participants of the two cultural groups had nearly identical facial expressions, both in public and in private D) the two had similar expressions in private, but the Japanese participants tried to mask their feelings in front of authority figures
Rapid biological changes in organisms followed by long, relatively static periods during which little biological change occurs is known as:
A. punctuated equilibrium. B. speciation. C. phyletic gradualism. D. allopatric speciation.
Sahelanthropus has an unusual combination of characteristics, including a
a. small braincase and huge browridges. b. large braincase and huge browridges. c. small braincase and small muscle attachments in the rear of the cranium. d. small vertical face and small browridges. e. large face and small dentition.
Australopithecus afarensis is dated from eight million to five million years ago, making these the earliest hominins
Indicate whether the statement is true or false.