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Give reasons: Oxygen is necessary for l...

Give reasons:
Oxygen is necessary for life.

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NAVNEET PUBLICATION-ENERGY FLOW IN AN ECOSYSTEM -EXERCISE
  1. Give reasons: Through the atmosphere contains 78% of molecular nitrog...

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  2. Give reasons: Denitrification reduces the fertility of the soil.

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  3. Give reasons: Oxygen is necessary for life.

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  4. Give reasons: Oxygen cycle can not operate in nature in the absence o...

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  5. Give reasons: Plants in an ecosystem are called producers.

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  6. Give reasons: Decomposers are crucial biotic factors in an ecosystem.

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  7. Write short note on Food Web

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  8. What is energy pyramid?

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  9. Describe in brief the bio-chemical cycles in nature. Carbon cycles.

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  10. Describe in brief the bio-chemical cycles in nature. Oxygen cycle.

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  11. Describe in brief the bio-chemical cycles in nature. Nitrogen cycle.

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  12. Write whether the following statements are true or false, if false cor...

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  13. Use your brain power What will be the effect on an ecosystem if only ...

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  14. Use your brain power Why is balance or equilibrium necessary in a foo...

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  15. Use your brain power What happens to the energy during its transfer f...

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  16. Use your brain power What would happens if the energy remains trapped...

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  17. Use your brain power Why are the number of tertiary consumers (apex c...

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  18. Use your brain power The carbon cycle is very effective in the temper...

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  19. Use your brain power Even through the carbon content on earth is cons...

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  20. Use your brain power Identify the relationship between carbon in the ...

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