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प्रश्न
Describe the advantages and disadvantages of cross-pollination to the plant.
उत्तर
Advantages of cross-pollination:
- The offspring are healthier.
- The seeds produced are abundant and viable.
- New varieties may be produced by cross-pollinating two different varieties of the same species.
Disadvantages of cross-pollination:
- Pollination is not always certain.
- The pollen has to be produced in large quantities.
- The process is uneconomical for the plant because the flowers have to be large, colored, scented and have to produce nectar for attracting pollinating agents.
संबंधित प्रश्न
Define the term Pollinating.
Can a unisexual flower be self pollinated?
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.
Answer the following question.
Write the difference in the characteristics of the progeny produced as a result of the two processes.
Coelacanth was caught in South Africa. State the significance of the discovery of Coelacanth in the evolutionary history of vertebrates.
Pollination occurs in ______.
Anemophily type of pollination is found in ______.
Choose the correct statement from the following:
What is ornithophily?
Match the Column I with Column II.
| Column I | Column II |
| A. Pea | (i) Xenogamy |
| B. Jawar | (ii) Epihydrophily |
| C. Maize | (iii) Anemophily |
| D. Vallis | (iv) Bisexual |
| E. Cannabis | (v) Geitonogamy |
