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What is a tree line?...

What is a tree line?

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Tree line is that altitudianal or latitudinal limit beyond which there are no trees and vegetation is formed of only herbs and shrubs.
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MODERN PUBLICATION-ORGANISMS AND POPULATIONS -NCERT FILE NCERT Exemplar Problems (C. SHORT ANSWER TYPE QUESTIONS)
  1. Why are coral reefs not found in the regions from West Bengal to Andhr...

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  2. If a freshwater fish is placed in an aquarium containing sea water, wi...

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  3. Why do all the freshwater organisms have contractile vacuoles whereas ...

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  4. Define heliophytes and sciophytes. Name a plant from your locality tha...

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  5. Why do submerged plants receive weaker illumination than exposed float...

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  6. In a sea shore, the benthic animals live in sandy, muddy and rocky sub...

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  7. Categorise the following plants into hydrophytes, halophytes, mesophyt...

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  8. In a pond, we see plants which are free-floating, rooted - submerged, ...

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  9. The density of a population in a habitat per unit area is measured in ...

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  10. (a) Label the three tiers 1, 2, 3 given in the above age pyramid. (b...

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  11. In an association of two animal species, one is a termite which feeds ...

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  12. Lianas are vascular plants rooted in the ground and maintain erectness...

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  13. Give the scientific names of any two microorganisms inhabiting the hum...

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  14. What is a tree line?

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  15. Define 'zero population growth rate'. Draw a age pyramid for the same.

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  16. List any four characters that are employed in human population census.

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  17. Give one example for each of the following types (a) Migratory anima...

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  18. Define the term (a) Immigration

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  19. Define the following (b) Emmigration

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