Sexual Reproduction in Flowering Plants — BIOLOGY STD 12 Science — Question

4. None of the above.

Explanation:

Perisperm, the nutritive tissue of the seed which originates from the tecrine or nucellus, outside the embryo sac.

It consits mainly of thin-walled parenchymatous cells rich in starch or oil, and, together with the endosperm within the embryo-sac, constitutes what was formerly known as albumen.

With the exception of some Alismaceas and Orchidaceas, almost all spermaphytes have perisperm in the early stages of the development of the seed; but in 'exalbuminous' seeds it, together with the endosperm, is absorbed before the seed is ripe.