Assertion :Calotropis and Orchids are entomophilous. Reason: They have pollen organized in form of pollinia.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Assertion is incorrect but Reason is correct.

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Calotropis and Orchids plants undergo insect pollination. 80% pollination occurs by insects and honeybee is main pollinator among the insects. All the flowers pollinated by bees are brightly coloured, have a sweet smell and produce nectar. Entomophilous flowers produce a small amount of pollen which has a spinous and may have a sticky exine due to presence of pollenkitt. The stigmas of such flowers are long, rough and sticky. Calotropis shows translator or clip mechanism. Pollen grains are present in pollinia. The pollinia are attached to a rough and sticky disc called corpusculum. When the insect visits the flower, pollinia get entangled in the legs of the insect. When this insect visits another flower, pollinia are transferred.

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(a) Both assertion and reason are correct and the reason is correct explanation of assertion
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