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……favours autogamy (A) Dicliny (B) Di...

……favours autogamy
(A) Dicliny
(B) Dichogamy
(C) Hekrogamy
(D) Homogamy

A

Dicliny

B

Dichogamy

C

Hekrogamy

D

Homogamy

Text Solution

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The correct Answer is:
D
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To avoid self-pollination and provide contrivance for cross pollination, the pollen grains of some flowers have no fertilizing effect on the stigma of the same flower but causes death. What is this condition called? (A) Homogamy (B) Dicliny (C) Self sterility (D) dichogamy

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Another term for cross-pollination is (A) allogamy (B) xenogamy (C) both above (D) autogamy

What is the type of pollination observed in viola and oxalis showing cleistogamy? (A) Self -Pollination (Autogamy) (B) Hydrophily (C) Zoophily (D) Geitonogamy

In bisexual flower physical barrier between anther and stigma is called (A) herkogamy (B) heterostyly (C) dichogamy (D) None of the above

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KUMAR PRAKASHAN-SEXUAL REPRODUCTION IN FLOWERING PLANTS-Section -F (Multiple Choice Questions)
  1. Self pollination is prevented by (A) Dichogamy (B) self sterility ...

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  2. Pollination which can occur in same plant is favoured by (A) herkogam...

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  3. ……favours autogamy (A) Dicliny (B) Dichogamy (C) Hekrogamy (D) ...

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  4. The flower may be of two or more types with regard to the length of st...

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  5. Allogamy has to be always performed with the help of (A) external age...

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  6. Allogamy is best favoured by (A) cleistogamy (B) dicliny (C) homo...

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  7. Allogamy is very useful because it results in (A) Formation of male ...

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  8. Another term for cross-pollination is (A) allogamy (B) xenogamy ...

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  9. The most exceptional feature of zoophilous flower is (A) scented havi...

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  10. In bisexual flowers, stamen and carpel mature at different times, by w...

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  11. In bisexual flowers, stamen and carpel mature at different times, by w...

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  12. …….is favoured by protandry (A) Self pollination (B) Cross pollinat...

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  13. To avoid self-pollination and provide contrivance for cross pollinatio...

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  14. Maize flowers are (A) autogamous (B) entomophilous (C) anemophilo...

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  15. In ……..flowers the stigma is always branched rough and sticky (A) ent...

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  16. Pollen grains of flower pollinated by wind or insects are not….. (A) ...

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  17. Besides tube nucleus, the pollen tube at the time of the entry of embr...

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  18. Egg apparatus is present on (A) micropylar end (B) chalazal end ...

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  19. Pollen tube is composed of (A) pectin (B) cutin (C) sporopollenin...

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  20. Which of the following promote pollen germination and tube growth?

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