Arrange the given structures starting from chalazal end to micropylar end in a mature embryo sac?
(A) Central cell
(B) Antipodals
(C) Synergids
(D) Egg
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (B), (A), (D), (C)
(B) Antipodals — first. Three antipodal cells sit at the chalazal end of the embryo sac.
(A) Central cell — second. The large central cell fills the middle and holds the two polar nuclei, just below the egg apparatus.
(D) Egg — third. The egg apparatus is at the micropylar end. The egg cell lies just above the two synergids, between them and the central cell.
(C) Synergids — fourth. The synergids are at the very micropylar tip, where their filiform apparatus guides the pollen tube in.
Note: A similar question was also asked in CUET (UG) 2026 on 15-05-2026 (Slot 1).
NCERT Extract:
The Pistil, Megasporangium (ovule) and Embryo Sac – “… Six of the eight nuclei are surrounded by cell walls and organised into cells; the remaining two nuclei, called polar nuclei are situated below the egg apparatus in the large central cell. There is a characteristic distribution of the cells within the embryo sac. Three cells are grouped together at the micropylar end and constitute the egg apparatus. The egg apparatus, in turn, consists of two synergids and one egg cell. The synergids have special cellular thickenings at the micropylar tip called filiform apparatus, which play an important role in guiding the pollen tubes into the synergid. Three cells are at the chalazal end and are called the antipodals.”