Because birds live in every climate and biome,and because they are easy to track and count,they serve as excellent ____.
A) keystone species
B) scapegoats
C) indicator species
D) aesthetic indicators
E) habitat determiners
Correct Answer:
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Q12: Bioprospectors are _.
A) miners that cause the
Q13: Throughout the 3.5 billion year history of
Q14: If estimates of an extinction rate 10,000
Q15: An endangered species _.
A) may soon become
Q16: The rate at which extinctions occurred prior
Q18: Biodiversity hotspots are _.
A) tropical areas where
Q19: After a mass extinction,what happens to biodiversity
Q20: Biodiversity experts estimate that during this century,the
Q21: Some toxic chemicals,such as those in DDT,can
Q22: Four of the following have resulted in
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