Question:

In a flowering plant, megaspore develops into an embryo sac, which contains:

Updated On: Jul 28, 2022
  • 4 cell, one of which is an egg
  • 6 cells, one of which is an egg
  • 8 cells, one of which is an egg
  • none of these
Hide Solution
collegedunia
Verified By Collegedunia

The Correct Option is D

Solution and Explanation

An ideal embryo sac contains $7$ cells and $8$ nuclei. $3$ cells are present at the micropylar end and form egg apparatus, mid of which forms egg cell and rest two lateral form synergids. One cell present in the centre of embryo sac which is known as secondary nuclei and contains two nuclei and rest three cells are present at chalazal end form antipodal cells,
Was this answer helpful?
0
0

Top Questions on Pre-Fertilisation: Structures And Events

View More Questions

Questions Asked in Manipal exam

View More Questions

Concepts Used:

Pre-fertilization events - Monoecious Plant

Fertilization in plants may be a process during which they undergo amphimixis in consequence of pollination and germination. During a physicochemical process, the male gametes (known as pollen) infusion with the feminine gametes (known as ovum) forms diploid zygote after carpal pollinates. The whole process happens in a zygote which later germinates into a seed. During the method, what happens is male gametes are transferred into female reproductive organs through pollinators (butterflies, birds, honey bees, bats, and flower beetles). This leads to an embryo being formed during a seed. Flowers are the reproductive organs of angiosperms and reproduce in a completely different method.

Read More: Flower Structure

The two important pre-fertilization procedures are gametogenesis and gamete transfer. The female and male reproductive forms in flowers are the androecium and the gynoecium which distinguishes and goes through development.

"Mono" means single so a monoecious plant is one that bears both male and female sex organs on same plant. The monoecious plant can produce bisexual flowers or unisexual flowers. A dioecious plant is one that bears both male and female sex organs on different plants.

Read Further: Sexual Reproduction in Flowering Plants