Four of the following are characteristics that make some species especially vulnerable to ecological and biological extinction. Select the exception.
A. low reproductive rates
B. small territories
C. feeds at high trophic level
D. narrow distribution
E. rare
Answer: B
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The greatest threats to groundwater supplies are
A) groundwater pollution and depletion. B) global warming and the construction of dams. C) increased evaporation and increased precipitation. D) evapotranspiration and runoff.
Much of the energy produced is lost before it can become useful. Explain how energy efficiency and the second law of thermodynamics may be useful in a discussion with another person on how to reduce CO2 and other greenhouse gas emissions.
What will be an ideal response?
Which of the following molecules is(are) polar?
A) CCl4 B) CH2Cl2 C) both of them D) neither of them
A(n) ____ is a body that survives the fall through the atmosphere and reaches Earth's surface
a. meteor b. meteorite c. asteroid d. comet