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Pollination

Dichogamy whi...

Question

Dichogamy which helps in cross pollination is a floral mechanism in which

A

Pollen sac and stigma are at different heights.

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B

Anther and stigma mature at different times.

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C

Structure of pollen sac and stigma functions as hurdles.

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D

Pollen grain is unable to germinate on the stigma of the same flower.

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Solution

The correct option is D Anther and stigma mature at different times.
Dichogamy - the maturation of male and female parts of a flower at different times, preventing automatic self - pollination. In this case, anther and stigma mature at different times.
So, the correct answer is (B).

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Similar questions

Q. Classify the given statements under the headings 'self pollination ' and 'cross pollination'.
a. Transfer of pollen grains from the anther to the stigma of the same flower.
b. Transfer of pollen grains from the anther to the stigma of a different flower.
c. No need of pollinators to transfer pollen grains.
d. Produces large amounts of pollen grains.
e. Requires pollinators to transfer pollen grains.

Q. The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which during pollination, bring genetically different types of pollen grains to stigma is:

Q. Which of the following is true about autogamy?
I. Pollen grains are deposited on the stigma of the same flower.
II. It requires synchrony in pollen release and stigma receptivity.
III. Autogamy cannot occur without pollinating agents.
IV. Anthers and stigma needs to be close.

Q. Consider the following statements with respect to the flowering plants and choose the correct option.
(a) Pollen grains represent the male gametes
(b) Functional megaspore develops into embryo sac that represents the female gamete
(c) Transfer of pollen grains from anther to stigma of different plants is known as xenogamy
(d) Transfer of pollen grains from anther to stigma or another flower of the same plant is known as geitonogamy.

Q. Which of the following is true about autogamy?
I. Pollen grains are deposited on the stigma of the same flower.
II. It requires synchrony in pollen release and stigma receptivity.
III. Autogamy cannot occur without pollinating agents.
IV. Anthers and stigma needs to be close.

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