The decline of the sea otter population in the Pacific Northwest has been attributed to:
A) Pollution from an oil spill
B) Predation by killer whales
C) An increase in the water temperature
D) Predation by Steller sea lions
E) A genetic mutation causing a decrease of fertility in male otters
Correct Answer:
Verified
Q15: Which of the following is not a
Q16: The total of all the resources,both biotic
Q17: In _ multiple species use the same
Q18: A gradual change in a community's species
Q19: A _ makes up a small portion
Q21: The "net primary productivity" is:
A)The amount of
Q22: An organism that can use energy and
Q23: Carbon returns to the atmosphere:
A)As carbon dioxide
B)From
Q24: Decomposers:
A)Obtain nutrients from detritus
B)Return organic molecules to
Q25: Nitrogen-fixing bacteria convert N2 into _.
A)Nitrates
B)Ammonia
C)Nitrites
D)Carbon dioxide
E)Methane
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