Geitonogamy

Q. Which of the following types of pollination may require pollinating agents but it is genetically similar to autogamy?

1. Geitonogamy
2. None of the above
3. Cleistogamy
4. Xenogamy

Q.

Which of the following is common in castor and maize plants?

1. Autogamy is prevented but not geitonogamy

2. Both autogamy and geitonogamy are prevented

3. Male and female flowers are borne by different plants

4. The anthers and stigma are placed at different positions to encourage cross-pollination.

Q.

Geitonogamy is functionally cross pollination involving a pollinating agent while genetically it is similar to autogamy.

1. True

2. False

Q. Choose the incorrect statement from the following statements.

1. Monoecious plants like castor and maize prevent both autogamy and geitonogamy.
2. Chalaza represents the basal part of the ovule.
3. Pollen grains are well preserved as fossils because of the presence of sporopollenin.
4. In wind pollination, the pollen grains are light and non-sticky so that they can be transported in the wind currents.

Q.

Justify the statement " although geitonogamy is functionally cross pollenation involving a pollinating agent , genetically it is similar to autogamy since pollen grains come from the same plant "

Q. In which of the following plants, both autogamy and geitonogamy does not occur naturally?

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

Q. Choose the correct statement from the following.

1. Cleistogamous flowers always exhibit autogamy
2. Chasmogamous flowers always exhibit geitonogamy
3. Cleistogamous flowers exhibit both autogamy and geitonogamy
4. Chasmogamous flowers never exhibit autogamy

Q.

Are mangoes dioecious?

Q. Geitonogamy does not occur in :

1. Dioecious plants
2. Unisexual flowers
3. Bisexual flowers
4. Monoecius plants

Q. A dioecious flowering plant prevents both

1. autogamy and geitonogamy
2. autogamy and xenogamy
3. geitonogamy and xenogamy
4. none of the above

Q.

Anthesis is absent in cleistogamy because?

1. No pollination is required.

2. It allows xenogamy.

3. It assures heterozygosity.

4. It favors insect pollination.

Q.

what are the advantages of self pollination?

Q.

When pollen is transferred from anther of a flower to stigma of another flower of the same plant, pollination is referred to

1. Siphonogamy

2. Geitonogamy

3. Xenogamy

4. Allogamy

Q.

The transfer of pollen grains from the anther to the stigma of another flower of the same plant is called:

1. Xenogamy

2. Karyogamy

3. Geitonogamy

4. Autogamy

Q.

In geitonogamy, pollen grains are transferred to

1. Genetically different flower

2. Genetically similar flower

3. Stigma of another flower of a different plant

4. Stigma of the same flower

Q. Suggest some advantages and disadvantages of self-pollination to a species of plant.

Q. A dioecious flowering plant prevents both

1. autogamy and geitonogamy
2. autogamy and xenogamy
3. geitonogamy and xenogamy
4. none of the above

Q. Write the difference between chasmogamous and cleistogamous flowers.

Q. Plant which prevent both autogamy and geitonogamy is

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

Q. Which one of them cannot exhibit both autogamy and geitonogamy?

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

Q. Plants with bisexual flowers show

1. I, II
2. III
3. I
4. IV

Q. Transfer of pollen from anthers of one flower to the stigma of another flower of the same plant is called

1. Geitonogamy
2. Xenogamy
3. Dicliny
4. Dichogamy

Q. Geitonogamy involves -

1. fertilisation of a flower by the pollen from another flower of the same plant
2. fertilisation of a flower by pollen from the same flower
3. fertilisation of a flower by the pollen from a flower of another plant in the same population
4. fertilsation of a flower by the pollen from a flower of another plant belonging to a distant population

Q. Assertion :Geitonogamy is functionally cross pollination and genetically self pollination. Reason: It involves pollinating agent but pollen grains come from same plant.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Self pollination which involves two different flowers of the same plant is called

1. Autogamy
2. Geitonogamy
3. Hybridization
4. Xenogamy

Q. Distinguish between the following:​

(i) Self-pollination and Cross-pollination.​

Q. Geitonogamy involves -

1. fertilisation of a flower by the pollen from another flower of the same plant
2. fertilisation of a flower by pollen from the same flower
3. fertilisation of a flower by the pollen from a flower of another plant in the same population
4. fertilsation of a flower by the pollen from a flower of another plant belonging to a distant population

Q.

What is Autogamous?

Q. Transfer of pollen grain from the anther to the stigma of another flower of the same plant is called

1. geitonogamy
2. xenogamy
3. cleistogamy
4. chasmogamy

Q. Define Geitonogamy.