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STD 12 - 1. sexual reproduction in flowering plants — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYSTD 12 - 1. sexual reproduction in flowering plants1 Mark
MCQ
Egg apparatus of angiosperms consist of
  • A
    One synergid and two egg cells
  • ✓
    Two synergids and one egg cell
  • C
    One central cell, two synergids and three antipodal cells
  • D
    One egg cell, two polar nuclei and three antipodal cells
✓

Answer

Correct option: B.
Two synergids and one egg cell
b
In embryo sac of angiosperm, egg apparatus occurs towards micropylar pole and generally organises by two synergids and one egg cell. Egg cell has a large vacuole at its upper and a prominent nucleus near its lower end. Synergids show a filiform apparatus attached to their upper wall. It is known to attract and guide the pollen tube. Each of the synergids has a vacuole at its lower end and the nucleus at its upper end.

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