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  4. An example of a seed with endosperm and perisperm is:

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Q. An example of a seed with endosperm and perisperm is:

NTA AbhyasNTA Abhyas 2022

Solution:

In castor seed, testa and tegmen are united together. The seed coat is tough and bright due to scleroproteins. Over narrower end, a brownish pad is found which is called the caruncle. The caruncle is carbohydrate in nature. This protects micropyle and develops as an integumental outgrowth after fertilization. Below the seed coat, a very thin membrane is found over the kernel and called perisperm (the persistent nucellus). Below perisperm, there is a large, white, swollen and oily mass called endosperm.