In a greenhouse, a plant would be best positioned so that its exposure to sunlight would be
A) within its limits of tolerance.
B) within its optimal range.
C) at its zones of stress.
D) at the photosynthetic limit.
B
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The Miller and Urey experiment shows that complex organic molecules
A. may have formed in hydrothermal vent habitats on early Earth. B. were probably brought to Earth by meteorites. C. may have been formed when lightning storms occurred on early Earth. D. may have been generated in volcanoes on young Earth.
A conductor differs from an insulator in that a conductor has
A) more electrons than protons. B) more protons than electrons. C) more energy than an insulator. D) faster moving molecules. E) none of the above
The two types of geologic age dates are ____________________ and ____________________. Fill in the blank(s) with the appropriate word(s)
Most of the damage from Hurricane Hugo was associated with:
a. wind damage to buildings in the storm's path b. flooding of coastal cities c. destruction of coral reefs and wildlife habitat d. wave erosion of beaches, roads, and buildings along the shore