CBSE 2025, Set 1

Question

The diagram given below shows labelling of four parts of a dicot embryo during its development as P, Q, R and S.

![Dicot Embryo Development](https://www.edvaya.com/images/cbse/biology/2025/dicot-embryo-development.webp)

Choose the option that indicates correct labelling of P, Q, R and S of the embryo in different stages of its development: A). P: Egg, Q: Suspensor, R: Radicle, S: Cotyledon B). P: Zygote, Q: Suspensor, R: Cotyledon, S: Plumule C). P: Egg, Q: Radicle, R: Suspensor, S: Cotyledon D). P: Zygote, Q: Suspensor, R: Cotyledon, S: Radicle

Edvaya · Accepted Answer

The correct answer is P: Zygote, Q: Suspensor, R: Cotyledon, S: Plumule. **SOLUTION** Based on the standard developmental stages of a dicotyledonous embryo: * **P** points to the diploid **Zygote** before it begins unequal cellular division. * **Q** points to the elongated row of cells known as the **Suspensor**, which pushes the embryo into the endosperm. * **R** points to the two developing **Cotyledons** (seen curving in the mature embryo). * **S** points to the shoot apical meristem, or **Plumule**, located between the cotyledons. Thus, P is Zygote, Q is Suspensor, R is Cotyledon, and S is Plumule.

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Biology > Reproduction And Genetics > Sexual Reproduction In Flowering Plants

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