How many nuclei are present in a typical mature embryo sac?
Answer and explanation
Correct answer: 8
The governing concept is the organisation of a typical angiosperm embryo sac. It is seven-celled but eight-nucleate: three antipodal cells contribute three nuclei, two synergids contribute two, and the egg contributes one. The central cell contains two polar nuclei. Thus the total is 3 + 2 + 1 + 2 = 8, making option B correct. Seven refers to cells, not nuclei.
Frequently asked questions
What is the correct answer to this question?
8
Why is this the correct answer?
The governing concept is the organisation of a typical angiosperm embryo sac. It is seven-celled but eight-nucleate: three antipodal cells contribute three nuclei, two synergids contribute two, and the egg contributes one. The central cell contains two polar nuclei. Thus the total is 3 + 2 + 1 + 2 = 8, making option B correct. Seven refers to cells, not nuclei.
Which subject and chapter does this question cover?
This is a Class 12 Biology question. Chapter: Molecular Basis of Inheritance. Topic: Sexual Reproduction in Flowering Plants.
