Arrange the given structures involved in embryo formation in correct…

The correct answer is Option (1) → B, D, C, A

(B) Zygote — comes first. It is formed by syngamy at the micropylar end of the embryo sac. Most zygotes divide only after some endosperm has formed, which gives the embryo assured nutrition.

(D) Globular embryo — comes second. The zygote first gives a proembryo, and this develops into a round, ball-like embryo.

(C) Heart-shaped embryo — comes third. The two cotyledons begin to form, and the embryo takes a heart shape.

(A) Mature embryo — comes last. It has an embryonal axis and two cotyledons in a dicot, and it is ready to become a seed.

Note: A similar question was also asked in CUET (UG) 2026 on 29-05-2026 (Slot 2) and on 14-05-2026 (Slot 1), and in CUET (UG) 2025 on 22-05-2025 (Slot 2).

NCERT Extract:
Embryo – “… Though the seeds differ greatly, the early stages of embryo development (embryogeny) are similar in both monocotyledons and dicotyledons. Figure 1.13 depicts the stages of embryogeny in a dicotyledonous embryo. The zygote gives rise to the proembryo and subsequently to the globular, heart-shaped and mature embryo.”