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Solution - Pre-fertilisation - Structures and Events - Pollination

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Question

What is self-incompatibility?

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If one can induce parthenocarpy through the application of growth substances, which fruits would you select to induce parthenocarpy and why?

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Lever mechanism of pollination is observed in

  1. Salvia
  2. Jasmine
  3. Bougainvillea
  4. Butea
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Make a list of any three outbreeding devices that flowering plants have developed and explain how they help to encourage cross-pollination.

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Why does self-pollination not lead to seed formation in self-incompatible species?

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A flower of tomato plant following the process of sexual reproduction produces 200 viable seeds.

Answer the following questions giving reasons :

(a) What would have been the minimum number of ovules present in pre-pollinated pistil ?

(b) How many microscope mother cells would minimally be required to produce requisite number of pollen grains ?

(c) How many pollen grains must have minimally pollinated the carple ?

(d) How many male gametes would have used to produce these 200 viable seeds ?

(e) How many megaspore mother cells were required in this process ?


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Solution for concept: Pre-fertilisation - Structures and Events - Pollination. For the courses 12th CBSE (Arts), 12th CBSE (Commerce), 12th CBSE (Science)
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