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Sexual Reproduction In Flowering Plants

Question

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Double fertilization involves

fertilization of the egg by two male gametes

fertilization of two eggs in the same embryo sac by two sperms brought by one pollen tube

fertilization of the egg and the central cell by two sperms brought by different pollen tubes

fertilization of the egg and the central cell by two sperms brought by the same pollen tube.

Solution

D.

fertilization of the egg and the central cell by two sperms brought by the same pollen tube.

Double fertilization is a complex fertilization mechanism of flowering plants ie, angiosperms. It involves the joining of a female gametophyte (megagametophyte, also called the embryo sac) with two male gametes (sperm). One male nucleus fertilizes the egg nucleus and the other male nucleus fertilizes the central cell (polar nuclei). First fertilization result in zygote where as second fertilization results in the formation of endosperm.

Some More Questions From Sexual Reproduction in flowering Plants Chapter

In a bisexual flower when the gynaecium matures earlier than anther, it is called as :

Simultaneous meiotic division of microspore mother cells leads to :

The fertilization occurs in the :

The female gametophyte of a typical dicot at the time of fertilization is:

Development of embryo from any cell of nucellus is called :

Parthenocarpic fruit is :

The entry of pollen tube into embryo sac through the integuments is termed as :

512 microspores will be formed following meiosis of how many microspore mother cells.

Pollination by water occurs in :

In ................... flowers, the thalamus grows upwards completely enclosing the ovary, and the stamens, petals and sepals are borne above the ovary.

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