Which of the following kinds of social interactions cannot be favoured by natural selection under any circumstance?

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#Question id: 4644

#Section 2: Evolution

The treeʹs horizontal axis is a timeline that extends from 100,000 years ago to the present; the vertical axis represents nothing in particular. The labeled branch points on the tree (V—Z) represent various common ancestors. Letʹs say that only since 50,000 years ago has there been enough variation between the lineages depicted here to separate them into distinct species, and only the tips of the lineages on this tree represent distinct species.

According to this tree, what percent of the species seem to be extant (i.e., not extinct)?

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#Question id: 12151

#Section 2: Evolution

The basic model of metapopulation dynamics predicts a shifting mosaic of occupied and unoccupied sites under which of the following combinations of extinction (E) and colonization (C) rates? 

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#Question id: 8909

#Section 2: Evolution

Which of the following terms or structures is properly associated only with animals?

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#Question id: 10706

#Section 1: Ecology

Assuming community occupy by 4 species with number 10, 20, 10, 20. What is Shannon weaver index of that community?

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#Question id: 12147

#Section 1: Ecology

Climax forests