Geitonogamy
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What are xenogamy and allogamy?
.The type of pollination between two different flowers of the same plant is called
Petal and sepals are collectively known as____.
- Perianth
- Bisexual
- Tepals
- Calyx
In self-pollination, parental characters are preserved.
True
False
- Cross pollinated seed
- Hybrid seed
- Mixed variety seed
- Soil-mud seed
In geitonogamy, pollen grains are transferred to
Genetically similar flower
Stigma of another flower of a different plant
Stigma of the same flower
Genetically different flower
Which of this is false about self-pollination?
Yielding new varieties is possible.
Pollen grains are not wasted.
Flowers need not be very attractive
It leads to degradation in the quality of offspring.
Which one of the following may require pollinators, but is genetically similar to autogamy?
Cleistogamy
Geitonogamy
Apogamy
Xenogamy
Which of the following statement is true regarding the disadvantages of self-pollination?
1. Continued self-pollination, may lead to weakening of the variety or the species
2. The seed produced by the weak variety are good in quality
3. The weaker or defective characters of the variety can be eliminated
4. The weaker variety yields new varieties
2
1
4
3
(a) State 2 reasons why pollen grain is well preserved as a fossil?
(b) What is the significance of cleistogamous flowers? (2M)
- fertilisation of a flower by pollen from the same flower
- fertilisation of a flower by the pollen from another flower of the same plant
- fertilisation of a flower by the pollen from a flower of another plant in the same population
- fertilsation of a flower by the pollen from a flower of another plant belonging to a distant population
- allogamy
- xenogamy
- geitonogamy
- autogamy
- Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
- Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
- Assertion is correct but Reason is incorrect.
- Both Assertion and Reason are incorrect.