What characterizes extreme climates?
A. Increased biodiversity and high population densities
B. Increased biodiversity and low population densities
C. Reduced biodiversity and low population densities
D. Reduced biodiversity and high population densities
Answer: C
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Some older cars vibrate loudly when driving at particular speeds. For example, at 65 mph, the car may be most quiet, but at 60 mph, the car rattles uncomfortably. How is this analogous to the quantized energy levels of an electron in an atom?
A. The vibrating car is analogous to one of the energy levels of the electron, which is the point at which the electron experiences resonance. B. There can be no analogy between a vibrating car and the quantized energy level of an electron in an atom since electrons don't vibrate. Doing so would cause the atom to break apart. C. A car is designed for maximum performance at particular speeds under given road conditions. Likewise, electron energy level transitions are smooth if they occur while the atom is in a low energy state. Changing the speed of the car for the road conditions is similar to subjecting the atom to unusual energy conditions. D. New cars and small atoms don't share this behavior because modern technology produces better cars and small atoms don't have enough electrons to move among quantized energy levels to cause vibration.
Fungi
A) include both unicellular and multicellular organisms. B) include both autotrophs and heterotrophs. C) always reproduce asexually using spores. D) cause tuberculosis and Lyme disease in humans.
The uneven, potholed surface of karst is caused by ____
a. ?erosion from ancient streambeds b. ?the pattern of deposited material from glaciers c. ?hardening of volcanic ash into tuff d. ?swelling due to the absorption of water e. ?the dissolution of the surface in the presence of acids
Precipitation of calcium carbonate in caverns can create:
a. springs. b. uvalas. c. sinkholes. d. stalactites. e. disappearing streams.