IA MODIFIED MASTERING BIOLOGY WITH E TEX
IA MODIFIED MASTERING BIOLOGY WITH E TEX
12th Edition
ISBN: 9780136781752
Author: Urry
Publisher: PEARSON
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Chapter 54, Problem 5TYU
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Introduction: Keystone species are those species that are present in very less number in an ecosystem but have profound impact on the ecosystem. They are generally predators but others can also act as keystone species.

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Predators that are keystone species can maintain species diversity in a community if theya) reduce the number of disruptions in the community.b) prey only on the least abundant species in the community.c) prey on the community's dominant species.d) competively exclude other predators
Based on the intermediate disturbance hypothesis,a community’s species diversity is increased by(A) frequent massive disturbance.(B) stable conditions with no disturbance.(C) moderate levels of disturbance.(D) human intervention to eliminate disturbance.
1. An ecologist studying several forest dwelling, insect eating bird species does not find any evidence of interspecific competition. The most likely explanation is (A) lack of a keystone species, (B) resource partitioning, (C) low species richness, (D) pronounced intraspecific competition, (E) coevolution of predator-prey strategies.

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IA MODIFIED MASTERING BIOLOGY WITH E TEX

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