Given below are two statements.
Statement I: The prickly pear cactus introduced into Australia in early 1920s caused havoc by spreading rapidly into millions of hectares of rangeland.
Statement II: When certain exotic species are introduced into a geographical area, they become invasive and start spreading fast because the invaded land does not have their natural predators.
In the light of the above statements, choose the most appropriate answer from the options given below.

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Both statements I and II are true.

Statement I is true but II is false.

Both statements I and II are false.

statement I is false but II is true.

answer is B.

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Detailed Solution

When certain exotic species are introduced into a geographical area, they become invasive and start spreading fast because the invaded land does not have their natural predators. The prickly pear cactus introduced into Australia in early 1920s caused havoc by spreading rapidly into millions of hectares of rangeland. Cactus-eating moth was introduced as a biological control methods to get rid of the menace.

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