Who were the first hominids thought to wear clothing, build fires, and live in caves or shelters?
a. Homo sapiens
b. Australopithecus africanus
c. Australopithecus afarensis
d. Homo habilis
e. Homo erectus
E
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The organ of Corti is located in the
a. brain stem. b. inner ear. c. abdominal cavity. d. middle ear. e. semicircular canals.
Kin selection is defined as:
a. selection for a behavior that raises an individual's own chances of survival or reproduction, as well as those of a related individual. b. selection for a behavior that lowers an individual's own chances of survival or reproduction, but raises those of a relative. c. selection for a behavior that lowers an individual's own chances of survival or reproduction, but raises those of another individual who may be reciprocally altruistic. d. selection that operates not just on one individual, but on all of its relatives as well. e. None of the above is correct.
It has been proposed that the first cells used RNA for both information storage and catalysis and that DNA and proteins evolved later. Which modern macromolecules may be relics of the hypothesized RNA world?
A. RNA polymerase B. ribosome C. spliceosome D. sigma factor
Which of the following animals has an eye with a single lens?
A) Dragonfly B) Jellyfish C) Human D) Butterfly E) Bee