Question

Perisperm present in certain seeds of angiosperms is derived from

• A. endosperm.
• B. nucellus.
• C. integuments.
• D. pericarp.

Answer 1

The correct option is B nucellus.

Nucellus is the diploid nutritive tissue present inside the ovule. Nucellus usually degenerates after fertilisation and creates space for the development of the embryo and endosperm. But in some plants nucellus persists in the mature seed even after fertilisation. Such persistent, residual nucellus in the seed is called perisperm. It stores nutrients and nourishes the embryo. Perisperm is found in the seeds of black pepper and beet.

Endosperm is a triploid nutritive tissue formed after fertilisation.

Integuments are the protective envelopes surrounding the ovule. After fertilisation, they develop into seed coat.

Pericarp is the fruit wall derived from the ovary.