Mention two strategies evolved to prevent self-pollination in flowers..

Solution

Plants have evolved different strategies to prevent self-pollination in flower like -

1. Unisexuality. The Plants bear unisexual flowers i.e. stamens and carpels occur in different flowers. They may be present on same plant e.g., in maize or on different plants e.g. in Papaya. The first condition is called monoecious and second is called dioecious. Since the male and female flowers are different the chances of self pollination are less.

2. Dichogamy. When stamens and carpels of bisexual flowers mature at different times, it is called as dichogamy. If stamens mature first it is called protandrous condition, or if carpels mature first it is called protogynous condition. since the stamens and the carpels mature at different time they cannot self pollinate.

Some More Questions From Sexual Reproduction in flowering Plants Chapter

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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Sexual Reproduction In Flowering Plants

Mention two strategies evolved to prevent self-pollination in flowers..

Some More Questions From Sexual Reproduction in flowering Plants Chapter

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.

In Calotropis, all the microspores of anther lobe remain united to form

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