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Hine' s emerald dragonflies are an endangered species that live in wet

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Senior Manager
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Joined: 30 Jan 2016
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Location: United States (MA)
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Hine' s emerald dragonflies are an endangered species that live in wet [#permalink]

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New post 21 Jan 2018, 09:44
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  45% (medium)

Question Stats:

67% (01:15) correct 33% (03:07) wrong based on 55 sessions

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Hine' s emerald dragonflies are an endangered species that live in wetlands. The larvae of these dragonflies can survive only in the water, where they are subject to predation by several species including red devil crayfish. Surprisingly, the dragonfly populations are more likely to remain healthy in areas where red devil crayfish are present than in areas without red devil crayfish.

Which one of the following, if true, most helps to explain the surprising fact?

(A) Red devil crayfish dig chainbers that remain filled with water even vvhen the sunounding wetlands dry up.
(B) Red devil crayfish present no threat to adult Hine's emerald dragonflies.
(C) The varied diet of the red devil crayfish does not include any animal species that prey on dragonfly larvae.
(D) Red devil crayfish are found in many more locations than Hine's emerald dragonflies are.
(E) Populations of red devil crayfish in a wetland do not drop significantly if the local population of Hine 's emerald dragonflies dies out.

Source: LSAT
[Reveal] Spoiler: OA

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Re: Hine' s emerald dragonflies are an endangered species that live in wet [#permalink]

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New post 21 Jan 2018, 10:28
A... Water is essential for larvae survival.

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Re: Hine' s emerald dragonflies are an endangered species that live in wet   [#permalink] 21 Jan 2018, 10:28
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Hine' s emerald dragonflies are an endangered species that live in wet

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