Question:

Transfer of pollen grains from the anther to the stigma of another flower of the different plant is known as

Updated On: Aug 1, 2022
  • autogamy
  • geitonogamy
  • xenogamy
  • cleistogamy
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The Correct Option is B

Solution and Explanation

Transfer of pollen grains from the anthers to the stigma of another flower of different plant (genetically different plant) is known as xenogamy or allogamy or cross-pollination and is carried out by external agencies like wind, water and animals. Geitonogamy, cleistogamy and autogamy are mode of self-pollination. Autogamy (transfer of pollen from anther of a flower to the stigma of same flower). Geitonogamy pollen grain of one flower are transfered to the stigma of another flower of same plant. Cleistogamy flower never open and pollen are deposited on stigma of same flower.
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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