Class 11 NEET Biology Plant Kingdom Questions Part 1

(a) : Mature ovule with embryo constitutes seed. The seed is covered with hard seed coat. The outerlayer of the seed coat is testa (from middle stony layer). Testa encloses a brown, thin membranous tegmen (from inner fleshy layer). The tegmen surrounds fleshy endosperm.
Inside endosperm is present the embryo. At maturity of seed, a thin layer of ovuliferous scale fuses with testa to form a wing (i.e., seeds are winged) which helps in the dispersal of seed.