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Biology
Sexual Reproduction in Flowering Plants
126 questions from 36 papers, each with its answer.
- 126 questions
- 36 papers
- 3.57% of Biology
Double Fertilisation
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Double fertilization is exhibited by
Syngamy + triple fusion occur only in angiosperms.
Double fertilization is a characteristic feature exhibited by angiosperms. It involves syngamy and triple fusion.
Outbreeding devices
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A dioecious flowering plant prevents both:
Dioecy allows only xenogamy.
When unisexual male and female flowers are present on different plants, the condition is called dioecious, and it prevents both autogamy and geitonogamy.
Pollination – agents
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Attractants and rewards are required for
Insect pollination needs attractants and floral rewards.
Insect-pollinated plants provide rewards such as edible pollen grains and nectar. Some plants also provide a safe place for deposition of eggs.
Megasporogenesis and female gametophyte
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Functional megaspore in an angiosperm develops into
The functional megaspore forms the embryo sac.
The megaspore is the first cell of the female gametophytic generation in angiosperms. It undergoes three successive free-nuclear mitotic divisions to form the 8-nucleate, 7-celled embryo sac.
Endosperm – coconut
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The morphological nature of the edible part of coconut is
Coconut water and kernel are endosperm.
Coconut has a double endosperm, with liquid (free-nuclear) endosperm and cellular endosperm; the edible part is the endosperm.
Pollination – anemophily
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Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by
Single-ovuled flowers in dense inflorescences suit wind pollination.
Wind pollination (anemophily) is favoured by flowers having a single ovule in each ovary and numerous flowers packed into an inflorescence. Wind pollination is non-directional.
That is every question in Sexual Reproduction in Flowering Plants for this filter.
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