Sexual Reproduction in Flowering Plants
- Which one of the following may require pollinators, but is genetically similar to autogamy?
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Geitonogamy, genetically, shows similarity with autogamy because the pollen grains are borne on the same plant.
Correct Option: D
Geitonogamy, genetically, shows similarity with autogamy because the pollen grains are borne on the same plant.
- Which of the following statements is not correct?
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Pollen grains of different species are incompatible, so they fail to germinate. If the pollen-stigma interaction is compatible, the pollen grain hydrates and germinates shortly following landing on the stigma.
Correct Option: A
Pollen grains of different species are incompatible, so they fail to germinate. If the pollen-stigma interaction is compatible, the pollen grain hydrates and germinates shortly following landing on the stigma.
- Which one of the following statements is not true?
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Tapetum is important for the nutrition and development of pollen grains, as well as a source of precursors for the pollen coat.
Correct Option: A
Tapetum is important for the nutrition and development of pollen grains, as well as a source of precursors for the pollen coat.
- A dioecious flowering plant prevents both:
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Autogamy occurs in bisexual flowers. Geitonogamous flowers are unisexual but present in the same plant. Dioecious condition is observed when unisexual male and female flowers are present on different plants and it prevents both autogamy and geitonogamy.
Correct Option: A
Autogamy occurs in bisexual flowers. Geitonogamous flowers are unisexual but present in the same plant. Dioecious condition is observed when unisexual male and female flowers are present on different plants and it prevents both autogamy and geitonogamy.
- Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by:
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Wind pollination or anemophily occurs in flowers which are having a single ovule in each ovary, and numerous flowers packed in an inflorescence. It is a non-directional pollination.
Correct Option: B
Wind pollination or anemophily occurs in flowers which are having a single ovule in each ovary, and numerous flowers packed in an inflorescence. It is a non-directional pollination.
