Which one of the following adaptation does not favour cross-pollination?

Cleistogamy

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Herkogamy

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Dichogamy

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None of the above

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Solution

The correct option is A
Cleistogamy

Herkogamy is the adaptation which facilitates cross pollination where the anthers and the stigma are placed at different positions in such a way that the anthers cannot reach the stigma of the flower. Dichogamy refers to maturation of male and female sex organs at different times. Some flowers, do not expose their sex organs. Such flowers are called cleistogamous and the phenomenon is called cleistogamy and here self-pollination takes place.

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Similar questions

When some plants produce more than one type of flowers the phenomenon called as a) herkogamy b)dichogamy c) heterostyly d) homogamy

Q. Define geitonogamy and xenogamy. Give advantages of self-pollination and cross-pollination. Explain how dichogamy favours cross pollination?

Match the following

$\begin{matrix} Column - I & Column-II (i) Dicliny & (a) Development of sterile pollen or ovary (ii) Dichogamy & (b) Anthers and stigma are placed at different position (iii) Herkogamy & (c) Pollen release and stigma receptivity are not synchronised (iv) Self sterility & (d) production of unisexual flowers \end{matrix}$

Herkogamy is an adaptation in which there is a physical barrier between anthers and stigma or spatial separation of them.

Q. Herkogamy favours cross pollination. In Pansy there is a hood covering the stigma. So how can pollen from other plants reach this stigma?

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