Arrange the given structures starting from inside to outside in an anatropous ovule.
(A) Inner integument
(B) Embryo sac
(C) Nucellus
(D) Outer integument
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (B), (C), (A), (D)
(B) Embryo sac — innermost. The embryo sac is the female gametophyte. It lies embedded inside the nucellus and holds the egg cell.
(C) Nucellus — second. It is the mass of cells in the middle of the ovule that surrounds the embryo sac. It stores food for the developing embryo.
(A) Inner integument — third. The nucellus is covered by protective envelopes called integuments. The inner integument lies next to the nucellus.
(D) Outer integument — outermost. It covers the inner integument. Both integuments leave a small opening, the micropyle, at the tip.