Overgrazing in savannas by domestic animals has contributed to the conversion of parts of this
ecosystem to:
a. chaparral.
b. grassland.
c. desert.
d. taiga.
e. ecotones.
C
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You are examining an enzyme associated with glycolysis. As such, you would expect
A) the protein to be a hormone. B) the protein to be induced by glucose. C) the protein to be constitutively expressed. D) the protein to be expressed only during development. E) the protein to be expressed only during mitosis.
A moth-pollinated flower is likely to have
A. red flowers that open in daytime, a wide landing area, and an odor resembling dead meat. B. blue or yellow flowers, a wide landing area, and no odor. C. lightly colored flowers, no landing area, and strong sweet perfume. D. blue or yellow flowers, a wide landing area, and not very much odor. E. white flowers with short tubes, a wide landing area, and no odor.
The oldest fossils of anatomically modern ________ are 160,000 years old
Fill in the blank(s) with correct word
The purple nonsulfur bacteria ________.
A. typically can grow aerobically in the dark as chemoorganoheterotrophs B. grow anaerobically as photoorganoheterotrophs C. utilize organic molecules as a source of electrons for photosynthesis D. All of the choices are correct.