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प्रश्न
Describe any three adaptations in hydrophilous flowers.
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उत्तर
- Flowers are small and inconspicuous.
- Perianth and other floral parts are unwettable.
- Pollen grains are long and unwettable due to the presence of mucilage.
- Nectar and fragrance are lacking in flowers.
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संबंधित प्रश्न
Lever mechanism of pollination is observed in
- Salvia
- Jasmine
- Bougainvillea
- Butea
A flower of tomato plant following the process of sexual reproduction produces 240 viable seeds.
Answer the following questions giving reasons :
(a) What is the minimum number of pollen grains that must have been involved in the pollination of its pistil?
(b) What would have been the minimum number of ovules present in the ovary?
(c) How many megaspore mother cells were involved?
(d) What is the minimum number of microspore mother cells involved in the above case?
(e) How many male gametes were involved in this case?
Name the part of the flower which the tassels of the corn- cob represent.
Fill in the blanks with suitable words.
Different timings for the maturation of gynoecium and androecium is called ________.
Give four adaptations shown by flowers pollinated by wind.
Answer the following question.
Write the difference in the characteristics of the progeny produced as a result of the two processes.
Very short answer type question:
What is hydrophily?
Which of these is a condition that makes flowers invariably autogamous?
Describe any three adaptations in anemophilous flowers.
Complete the following table:
| Sr. | Type of pollination | Agent | Kind of flower | Examples |
| (i) | ______ | Wind | ______ | Maize |
| (ii) | Chiropterophily | ______ | Dull colour, with strong fragrance, abundant nectar | Adansonia |
| (iii) | Entamophily | Insects | ______ | Rose/Jasmine |
| (iv) | Ornithophily | ______ | Brightly coloured, large and showy. They secrete profuse, dilute n ectar | ______ |
