STRUCTURAL ORGANISTION OF PLANTS AND ANIMALS
MORPHOLOGY OF FLOWERING PLANTS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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being a haploid tissue
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having no reserve food
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being a diploid tissue
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its formation by fusion of secondary nucleus with several sperms
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Detailed explanation-1: -Perisperm is remnants of nucellus which is diploid (2n) but endosperm is triploid (3n). Perisperm occurs in the seeds of black pepper, coffee, castor, cardamom and Nymphaea. Endosperm is the food-laden tissue which is meant for nourishing the embryo in seed plants.
Detailed explanation-2: -Perisperm is nutritive tissue in the seed, so functionally similar to the endosperm. But perisperm is diploid as it is developed from nucellus by mitosis, while endosperm is triploid. Hence option C is the correct answer.
Detailed explanation-3: -The differentiating factor between both tissues is that perisperm is diploid, emerging from the nucleus, while the endosperm is triploid, emerging from triple fusion.
Detailed explanation-4: -Endosperm has reserve food whereas perisperm lacks it.
Detailed explanation-5: -Perisperm is the remnant of nucellus which are persistent. It encloses the embryo and provides nourishment to it in certain seeds. Endosperm is the tissue formed after double fertilisation. It surrounds, stores food and provide nourishment to the embryo in an angiosperm seed.