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Sexual Reproduction In Flowering Plants

Question
CBSEENBI12003024
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Which one of the given pollination technique/adaptation is different than others?

  • Herkogamy

  • Geitonogamy

  • Dichogamy

  • Heterostyly

Solution

B.

Geitonogamy

Geitonogamy is a technique of self-pollination, in which pollen of one flower is deposited on the stigma of another flower of the same plant. While others are mechanisms adopted by bisexual flowers to avoid self-pollination and promote Cross-pollination.

• Dichogamy The condition where the maturing time of anther and stigma is different. Anther matures first, i.e.protandry, stigma matures first, i.e. protogyny.
• Herkogamy Includes mechanical barrier in flower to ensure cross-pollination.
• Heterostyle The height of stigma and Anther is different to avoid self-pollination.

Some More Questions From Sexual Reproduction in flowering Plants Chapter

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

Albuminous seeds store reserve food materials in ....................

Transfer of pollen grains from the anther to the stigma of another flower of same plant is called..............................

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