Which of the following statements are correct?
(A) In angiosperms, the seed is not the final product of sexual reproduction.
(B) Seed is often described as a fertilised ovule.
(C) A seed typically consists of seed coat(s), cotyledon(s) and an embryo axis.
(D) Albuminous seeds have no residual endosperm as it is completely consumed during embryo development (e.g., pea, groundnut).
(E) Persistent nucellus is the perisperm.
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → B, C and E only.
After double fertilisation, the ovule develops into the seed and the ovary into the fruit. Seeds differ in whether some endosperm is left in them when they are mature.
(A) In angiosperms, the seed is not the final product of sexual reproduction. — False. The seed is the final product of sexual reproduction in angiosperms.
(B) Seed is often described as a fertilised ovule. — True. The seed develops from the ovule after fertilisation, so it is called a fertilised ovule.
(C) A seed typically consists of seed coat(s), cotyledon(s) and an embryo axis. — True. These are the three parts of a typical seed.
(D) Albuminous seeds have no residual endosperm as it is completely consumed during embryo development (e.g., pea, groundnut). — False. This describes non-albuminous seeds. Albuminous seeds such as wheat, maize, barley and castor keep part of the endosperm.
(E) Persistent nucellus is the perisperm. — True. In seeds such as black pepper and beet, a part of the nucellus remains. This residual nucellus is the perisperm.
NCERT Extract:
Seed – “In angiosperms, the seed is the final product of sexual reproduction. It is often described as a fertilised ovule. Seeds are formed inside fruits. A seed typically consists of seed coat(s), cotyledon(s) and an embryo axis. … Mature seeds may be non-albuminous or ex-albuminous. Non-albuminous seeds have no residual endosperm as it is completely consumed during embryo development (e.g., pea, groundnut). Albuminous seeds retain a part of endosperm as it is not completely used up during embryo development (e.g., wheat, maize, barley, castor). Occasionally, in some seeds such as black pepper and beet, remnants of nucellus are also persistent. This residual, persistent nucellus is the perisperm.”