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# Some insects are able to feed on the leaves of milkweed, a toxic plant

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Some insects are able to feed on the leaves of milkweed, a toxic plant  [#permalink]

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16 Feb 2019, 10:45
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Difficulty:

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Question Stats:

92% (02:13) correct 8% (01:42) wrong based on 13 sessions

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Some insects are able to feed on the leaves of milkweed, a toxic plant, by first cutting and draining the vein that secretes the toxin. This method of detoxification guarantees that some insects will always be able to eat milkweed, because the plant could never evolve to produce a toxin that is lethal in the trace amounts left after the vein is cut.

The conclusion drawn in the passage above depends on which of the following assumptions?

(A) The insects that successfully detoxify milkweed are not able to undergo the evolutionary changes necessary to allow them to detoxify other plants.
(B) Unlike milkweed, other kinds of toxic plants would be able to overcome their vulnerabilities to predators through evolutionary changes.
(C) The toxin-carrying veins of the milkweed plant can never evolve in such a way that insects cannot cut through.
(D) The method of detoxification used by insect predators of milkweed would not successfully detoxify other kinds of toxic plants.
(E) There are insects that use means other than draining the toxin in order to feed on toxic plants

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Re: Some insects are able to feed on the leaves of milkweed, a toxic plant  [#permalink]

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17 Feb 2019, 02:16
carcass wrote:
Some insects are able to feed on the leaves of milkweed, a toxic plant, by first cutting and draining the vein that secretes the toxin. This method of detoxification guarantees that some insects will always be able to eat milkweed, because the plant could never evolve to produce a toxin that is lethal in the trace amounts left after the vein is cut.

The conclusion drawn in the passage above depends on which of the following assumptions?

(A) The insects that successfully detoxify milkweed are not able to undergo the evolutionary changes necessary to allow them to detoxify other plants.
(B) Unlike milkweed, other kinds of toxic plants would be able to overcome their vulnerabilities to predators through evolutionary changes.
(C) The toxin-carrying veins of the milkweed plant can never evolve in such a way that insects cannot cut through.
(D) The method of detoxification used by insect predators of milkweed would not successfully detoxify other kinds of toxic plants.
(E) There are insects that use means other than draining the toxin in order to feed on toxic plants

Discussed here: https://gmatclub.com/forum/some-insects ... 98438.html
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Re: Some insects are able to feed on the leaves of milkweed, a toxic plant   [#permalink] 17 Feb 2019, 02:16
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