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Why do submerged plants receive weaker i...

Why do submerged plants receive weaker illumination than exposed floating plants in a lake?

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Submerged plants receive weaker illumination than exposed floating plants in a lake because all colours of the visible components of the spectrum of light do not enter or penetrate in the depths of water.
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NCERT EXEMPLAR-ORGANISMS AND POPULATIONS-Organisms And Populations
  1. Why do all the freshwater organisms have contractile vacuoles whereas ...

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

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

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

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

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

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

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

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

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

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

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  12. What is a tree line?

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

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

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

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  16. Fill in the blanks

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  17. Observe the set of 4 figures A, B, C and D and answer the following q...

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  18. Comment on the following figure: I, II and III, A, B, C, D, G, P, Q, R...

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  19. An individual and a population has certain characteristics. Name these...

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  20. The following diagrams are the age pyramids of different populations. ...

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