The movement of pollen grains in water is observed by .

Fredric Brown

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Robert Brown

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Emmett Brown

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Solution

The correct option is B Robert Brown
Robert Brown, a Scottish botanist observed that the pollen grains in air or water exhibit a zig-zag, random movement. It's kind of like a ball being beaten around by some footballers during practice. Brownian motion is named after this observation.

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Similar questions

Q. When pollen grains in water are viewed under a microscope they are seen to be constantly moving. This movement is called _____.

Name the scientist who studied the movement of pollen grains suspended in water through a microscope.What is this phenomenon known as ?

Which of the following statements is/are correct for hydrophily?

(i) Pollination by water is rare in flowering plants and is limited mostly to monocotyledons.

(ii) In majority of aquatic plants such as water hyacinth and water lily pollination takes place by insects and winds.

(iii) In most of the water pollinated species pollen grains are protected from getting wet by a mucilaginous covering.

(iv) In Vallisneria, female flowers reach the surface of water and receive the pollen grains, whereas in Zostera, female flowers remain submerged and receive pollen grains under water.

Q. (a) Name the organic material of the exine of the pollen grain. How is this material advantageous to pollen grain?
(b) Still, it is observed that it does not form a continuous layer around the pollen grain. Give reason.
(c) How are 'pollen banks' useful?

Q. (a) Name the organic material which makes up exine of the pollen grain. How is this material advantageous to pollen grain?

(b) Still it is observed that it does not form a continuous layer around the pollen grain. Give reason.

(c) How are 'pollen banks' useful? [3]

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The movement of pollen grains in water is observed by .

The correct option is B Robert Brown Robert Brown, a Scottish botanist observed that the pollen grains in air or water exhibit a zig-zag, random movement. It's kind of like a ball being beaten around by some footballers during practice. Brownian motion is named after this observation.

The correct option is B Robert Brown
Robert Brown, a Scottish botanist observed that the pollen grains in air or water exhibit a zig-zag, random movement. It's kind of like a ball being beaten around by some footballers during practice. Brownian motion is named after this observation.