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प्रश्न
State four features of flowers pollinated by insects.
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उत्तर
- Flowers are large and brightly coloured.
- Pollen grains covered with pollen kit, rough and sticky.
- Sepals and petals are well developed.
- A nectar gland is present.
संबंधित प्रश्न
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 ?
Why angiosperm anthers are called dithecous?
The transfer of pollen grains from the anther to the stigma of the same or of another flower of the same kind is known as ______.
Exine and intine are the parts of
Give one word/term for the following:
Pollination of flowers by birds.
Type of interaction where an individual sacrifices its own welfare (life) for the benefit of another animal of its own species is ______.
- Nucellus
- Antipodals
- Synergids
- Micropyle
Wind pollination is common in ______.
Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by ______.
From among the situations given below, choose the one that prevents both autogamy and geitonogamy.
