Arrange the given stages involved in embryo development in a dicot angiosperm in correct sequence
(A) Globular embryo
(B) Proembryo
(C) Zygote
(D) Heart shaped embryo
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → (C), (B), (A), (D)
(C) Zygote — first. The zygote is the fertilised egg, formed by the fusion of a male gamete with the egg cell. It lies at the micropylar end of the embryo sac.
(B) Proembryo — second. The zygote divides to form the proembryo, the first small group of cells of the future embryo.
(A) Globular embryo — third. The proembryo grows into a round, ball-shaped embryo.
(D) Heart shaped embryo — last. In a dicot, the two cotyledons start to grow out at the top of the globular embryo, so it takes the shape of a heart. It then matures into the embryo of the seed.
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NCERT Extract:
Embryo –
