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Coelacanth was caught in South Africa. S...

Coelacanth was caught in South Africa. State the significance of discovery of Caelacanth in the evolutionary history of vertebrates.

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**Step-by-Step Solution:** 1. **Introduction to Coelacanth:** - The Coelacanth is a prehistoric fish that was believed to have been extinct for around 66 million years until it was rediscovered in 1938 off the coast of South Africa. 2. **Evolutionary Significance:** - The discovery of Coelacanth is significant because it represents a lineage of lobe-finned fishes, which are crucial in understanding the evolution of vertebrates, particularly the transition from aquatic to terrestrial life. ...
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XII BOARD PREVIOUS YEAR PAPER ENGLISH-XII BOARDS-Section A
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  2. According to the Hardy-Weinberg principle, the allele frequency of a p...

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  3. Coelacanth was caught in South Africa. State the significance of disco...

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  4. State the functions of mast cells in allergy response.

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  5. State the function of interpherons .

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  6. What is the cell that receives a recombinant gene called ?

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  7. Name an organsim where cell division in itself is a mode of reproducti...

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  8. When does a human body elicit an anamnestic response?

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  9. Name any two disease the 'Himgiri' variety of wheat is resistant to.

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  10. State the role of transposons in silencing of mRNA in eukaryotic cells...

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  11. Why are green algae not likely to be found in the deepest strata or th...

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  12. State what does 'standing crop' of a trophic level represent.

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  13. Why is it desirable to use unleaded petrol in vehicles fitted with cat...

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  14. Name the type of biodiversity represented by the following: i) 1000 ...

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  15. Write the name of the organism that is referred to as the "Terror of B...

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  16. What are 'true breeding lines' that are used to study inheritance patt...

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  17. Name any two types of cells which act as "Cellular barriers" to provid...

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  18. Mention the type of host cells suitable for the gene guns to introduce...

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  19. How is 'stratification' represented in a forest ecosystem?

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  20. Give an example of an organism that enters 'diapause' and why.

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