Criteria for Autogamy to Take Place

Q. Both autogamy and geitonogamy are prevented in:

1. Castor
2. Papaya
3. Maize
4. Cucumber

Q. Assertion: Cleistogamous flowers produce assured seed-set even in the absence of pollinators.
Reason : Cleistogamous flowers have exposed anthers and stigma.

1. Both assertion and reason are true and reason is the correct explanation of assertion.
2. Both assertion and reason are true but reason is not the correct explanation of assertion.
3. The assertion is true but reason is false.
4. Both assertion and reason are false.

Q. Which one of the following pollinations is autogamous?

1. Homogamy
2. Xenogamy
3. Chasmogamy
4. Cleistogamy

Q. Which among the following prevents outbreeding?

1. Chasmogamy
2. Cleistogamy
3. Dichogamy
4. Herkogamy

Q.

Bisexual flower remains closed all their life so that pollen can easily pollinate the stigma of the flower .

Q. Pollinators are not required for successful pollination and fertilisation when the flowers exhibit

1. chasmogamy
2. herkogamy
3. dichogamy
4. cleistogamy

Q.

The one advantage of cleistogamy is :

1. It leads to greater genetic diversity

2. Seed dispersal is more efficient and widespread

3. Seed set is not dependent on pollinators
4. Each visit of pollinator results in the transfer of hundreds of pollen grains

Q. Cleistogamous flowers are _______________.

1. wind-pollinated
2. water-pollinated
3. insect-pollinated
4. self-pollinated

Q.

Unisexuality of flowers prevents:

1. geitonogamy, but not xenogamy

2. autogamy and geitonogamy

3. autogamy, but not geitonogamy

4. both geitonogamy and xenogamy

Q. Even in the absence of pollinating agents, seed-setting is assured in

1. Salvia
2. fig
3. Commelina
4. Zostera

Q.

In which one of the following pollinations is autogamous?

1. Cleistogamy

2. Geitonogamy

3. Xenogamy

4. Chasmogamy