First slide

Pre-fertilisation : Structures and Events

Question

Consider the following statements about embryosac.
a. Polygonum type of embryo sac is bisporic and is 7-celled and 8-nulceated structure.
b. Six of eight nuclei are surrounded by their own cell wall in the embryo sac.
c. Polar nuclei are not surrounded by their own wall but surrounded by megaspore wall

Easy

A

only a is correct
B

only b and c are correct
C

a, b and c are correct
D

a and b are correct but c is incorrect

Solution

In an embryosac usually there are seven cells and eight nuclei. The nuclei of egg apparatus and antipodals have their own walls but not the polar nuclei. Polar nuclei have the megaspore wall as their cell wall.

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