Q9 of 53 Page 9

From the statements given below choose the options that are true for a typical female gametophyte of a flowering plant:

i. It is 8-nucleate and 7-celled at maturity


ii. It is free-nuclear during the development


iii. It is situated inside the integument but outside the nucellus


iv. It has an egg apparatus situated at the chalazal end


A typical female gametophyte of a flowering plant also known as embryo sac at maturity is 8-nucleate and 7-celled.


The mitotic divisions in the formation of embryo sc are strictly free nuclear, that is, nuclear divisions are not followed immediately by cell wall formation.


Embryo sac is located in the nucellus within the integuments and not outside the nucellus. So option (iii) is wrong.


The cells in the embryo sac are distributed such that the three cells are grouped together at the micropylar end and constitute the egg apparatus. And the three cells are at the chalazal end and are called the antipodals. So the egg apparatus is situated micropylar end. So option (iv) is wrong.


Therefore, correct answer is option (c).

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