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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
Draw a diagram of a section of a megasporangium of an angiosperm and label funiculus, Micropyle, embryosac and nuclleus.
Fill in the blanks:
The two kinds of pollination are __________ and __________.
Give one word/term for the following:
When stigma and anthers do not grow up to the same height, which favors only cross-pollination.
Which of these is a condition that makes flowers invariably autogamous?
During Hybridization process anther of the bisexual flower is removed before it dehisces is called ______.
In which one of the following pollination is autogamous?
The term used for transfer of pollen grains from anthers of one plant to stigma of a different plant which, during pollination, brings genetically different types of pollen grains to stigma, is ______
What is epihydrophily?
Name the following:
Aquatic plants which are anemophilous.
