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Question
Assertion :In most angiosperms, microspores of a tetrad grow and separate from one another shortly after meiosis. Reason: In the members of families Orchidaceae and Asclepiadaceae, all the pollen grains of a sporangium remain united to form a compact structure called pollinium.
Assertion :In most angiosperms, microspores of a tetrad grow and separate from one another shortly after meiosis. Reason: In the members of families Orchidaceae and Asclepiadaceae, all the pollen grains of a sporangium remain united to form a compact structure called pollinium.
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Solution
The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
In most angiosperms, microspores(pollen grains) of a tetrad grow and separate from one another shortly after meiosis. However, in some plants the spores tend to remain together in tetrads for longer periods and develop into compound pollen grains(e.g., Drimys, Drosera). In many members of families Orchidaceae and Asclepidadaceae, all the microspores in a sporangium remain united to form a pollinium.So, the correct answer is 'Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion'.
In most angiosperms, microspores(pollen grains) of a tetrad grow and separate from one another shortly after meiosis. However, in some plants the spores tend to remain together in tetrads for longer periods and develop into compound pollen grains(e.g., Drimys, Drosera). In many members of families Orchidaceae and Asclepidadaceae, all the microspores in a sporangium remain united to form a pollinium.
So, the correct answer is 'Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion'.
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