The most common problem encountered by seabirds coated with oil is ____.
A. immediate death
B. vulnerability to predators
C. loss of buoyancy and insulation, causing deaths from drowning or loss of body heat
D. poisoning by taking in the oil internally
E. starvation
Answer: C
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Diurnal temperature ranges are often greater than annual temperature ranges in tropical rain forest climates
Indicate whether the statement is true or false
The term "global change" refers to what type of problems?
A) environmental B) political C) economic D) social E) environmental, political, economic and social
A general pattern to climate change is that the polar regions are warming faster than the rest of the Earth. This is likely to cause
A. tropical diseases will move to the poles. B. more air pollution in polar regions. C. many organisms will be able to expand their range toward the poles as the climate warms. D. None of these is correct.
Which of the following is true of thymine and uracil?
A) Both have a methyl group at C-5 B) Thymine has a methyl group at C-5 but uracil does not. C) Uracil has a methyl group at C-5 but thymine does not. D) Neither has a methyl group at C-5.