BIOLOGY (LL)
BIOLOGY (LL)
5th Edition
ISBN: 9781264115495
Author: BROOKER
Publisher: MCG
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Chapter 60, Problem 9TY

Over time, dark forms of the peppered moth (Biston betularia) became more common in polluted environments because predators were less able to detect them on trees darkened by soot. These moths are regarded by many as a(n)

  1. a. keystone species.
  2. b. indicator species.
  3. c. umbrella species.
  4. d. flagship species.
  5. e. endangered species.
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