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Question
State four features of flowers pollinated by insects.
Solution
1. Flowers large and brightly coloured.
2. Pollen grains covered with pollen kit, rough and sticky.
3. Sepals and petals well developed.
4. Nectar gland present.
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RELATED QUESTIONS
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 ?
Make a list of any three outbreeding devices that flowering plants have developed and explain how they help to encourage cross-pollination.
What is self-incompatibility?
What is meant by emasculation?
Fill in the blank:
Male sex cells in plants are called _________.
Complete the following chart and rewrite.
| Sr.No. | Agencies | type of pollination |
| 1 | Water | .................... |
| 2 | ........................... | Entomophily |
| 3 | Bat | .................... |
| 4 | ....................... | Ornithophily |
(Or)
Explain outbreeding devices in angiospermic plants.
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Plants with ovaries having only one or a few ovules are generally pollinated by ______.
What are the major abiotic factors that influence habitat?
