Which of the following is NOT a characteristic
of Australopithecus afarensis?
a. chimpanzee sized brain
b. narrow pelvis
c. S-shaped backbone
d. opening at the base of the skull
e. more than one of these is NOT a
characteristic of A.afarensis
B
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Which of the following statements regarding biogeochemical cycles is incorrect?
A. Cycles are simple systems between living and nonliving components. B. Recycling keeps nutrients in balance. C. All organisms directly participate in recycling. D. Elements cycle through biotic and abiotic environments. E. All elements originate from a nonliving, long-term reservoir.
Equilibrium is sensed by
a. chemoreceptors. b. mechanoreceptors. c. photoreceptors. d. thermoreceptors. e. none of these.
What is enzyme activity?
Exposer to air is necessary for microbial growth.
a. true b. false