Question

The diagram given below shows labelling of four parts of a dicot embryo during its development as P, Q, R and S.

Choose the option that indicates correct labelling of ‘P’, ‘Q’, ‘R’ and ‘S’ of embryo in different stages of its development:

विकल्प

• P - Egg, Q - Suspensor, R - Radicle, S - Cotyledon

• P - Zygote, Q - Suspensor, R - Cotyledon, S - Plumule

• P - Egg, Q - Radicle, R - Suspensor, S - Cotyledon

• P - Zygote, Q - Suspensor, R - Cotyledon, S - Radicle

Answer 1

P - Zygote, Q - Suspensor, R - Cotyledon, S - Plumule

Explanation:

P is a fertilized egg, or zygote. The embryo is pushed into the nutrient-rich endosperm by Q, a suspensor. The initial seed leaves, known as cotyledons, store sustenance for the developing embryo. S stands for plumule, the apex of the embryonic stem that eventually becomes the main stem.