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प्रश्न
Coelacanth was caught in South Africa. State the significance of the discovery of Coelacanth in the evolutionary history of vertebrates.
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उत्तर
Coelacanth was a fish was caught in South Africa in 1938, which was thought to be extinct. These animals were called lobefins which evolved into first amphibians that lived on both land and water. These are considered to be the ancestors of modern days frogs and salamanders.
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संबंधित प्रश्न
Lever mechanism of pollination is observed in
- Salvia
- Jasmine
- Bougainvillea
- Butea
What is meant by pollination?
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.
Which one of the following is one of the characteristics of self-pollinated flowers?
What is a flower? Draw a typical flower and label its different parts.
Describe pollination. How many types of pollinations are found?
Give an account of any two biotic agents for pollination along with their adaptations.
Which of these is a condition that makes flowers invariably autogamous?
Correct definition of pollination is ______
Choose the correct statement from the following:
