Question Video: Describing the Term “Pollination” | Nagwa Question Video: Describing the Term “Pollination” | Nagwa

Question Video: Describing the Term “Pollination” Science • Second Year of Preparatory School

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Which of the following best describes the process of pollination? [A] The growth of a root and a shoot from a seed after a period of dormancy. [B] The fusion of the male and female gametes in a plant. [C] The transfer of pollen grains from the male reproductive organs of a flower to the female reproductive organs. [D] The process of the developing of male and female reproductive organs in flowering plants.

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Video Transcript

Which of the following best describes the process of pollination? (A) The growth of a root and a shoot from a seed after a period of dormancy. (B) The fusion of the male and female gametes in a plant. (C) The transfer of pollen grains from the male reproductive organs of a flower to the female reproductive organs. Or (D) the process of the developing of male and female reproductive organs in flowering plants.

As you may have learned, many plant species are capable of both asexual and sexual reproduction. Asexual reproduction, which in plants is often referred to as vegetative propagation, does not involve the fusion of gametes, or sex cells. During vegetative propagation, parts of a single parent plant develop into new plants that are genetically identical to the parent, referred to as clones. For example, strawberry plants produce clones from special horizontal stems called offshoots.

In contrast, sexual reproduction requires the fusion of male and female gametes. In flowering plants, these gametes are located in the reproductive organs within flowers. The male organs are called stamens and consist of a thin filament supporting an anther. The anthers produce pollen grains, which contain the male gametes or sperm. The female organs are called carpels or pistils. They consist of a stigma, a style, and an ovary. Within the ovary are structures called ovules, which surround the female gametes, called ova or ovum in the singular.

For a sperm to reach an ovum, pollen must make its way from the anther to the stigma. The transfer of pollen is accomplished with the help of animals, including insects, bats, and hummingbirds, or by wind. The cells of the stigma typically produce a sticky substance that helps the pollen stay put once it is deposited. We call this transfer of pollen from male organs to female organs pollination.

Therefore, the answer choice that best describes pollination is (C): the transfer of pollen grains from the male reproductive organs of a flower to the female reproductive organs.

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