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Mention the purpose of blacking the inte...

Mention the purpose of blacking the interior of a solar cooker.

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The black pained surface is used in the interior of a solar cooker because black surface
abosorbs more heat rays of the sum .
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X BOARDS-X BOARDS-SECTION A
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  2. How many pairs of chromosomes are present in human beings ? Out of the...

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  3. Mention the purpose of blacking the interior of a solar cooker.

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  4. Name the gland and the hormone secreted by the gland, which are associ...

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  5. Explain how water and minerals are transported in plants?

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  6. Explain how the movement of leaves of a sensitive plant is different ...

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  7. Write any three characteristics of a good fuel.

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  8. List six specific characteristics of sexual reproduction.

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  9. List four points of significance of reproductive health in a society....

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  10. Define photosynthesis.

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  11. List two natural ecosystems.

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  12. Name the plant hormones responsible for the following functions: (i)...

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  13. Differentiate between the following with suitable examples : (i) min...

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  14. Name the system which facilitates communication between central nervou...

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  15. How do organisms , whether reproduced asexually or sexually maintain a...

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  16. Suggest three contraceptive methods to control the size of human popul...

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  17. (a) Explain how the separation of oxygenated and deoxygenated blood is...

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  18. What is meant by speciation ? List four factors that could lead to sp...

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  19. Name one plant hormone which inhibits growth. Write its one more funct...

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  20. "What was Chipko Andolan"? How did this Andolan ultimately benefit the...

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