Q5 of 18 Page 146

If an animal of euphotic zone has to survive in abyssal zone, what adaptations are required to survive there? (AS1)

If an animal of euphotic zone has to survive in abyssal zone, it should be heterotrophic as no light is present in abyssal zone and animal should be red coloured as red is the colour of highest wavelength.


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3

Collect some aquatic plants- cut the leaves and stems Observe them under microscope and record your observations like air presence /absence of air spaces etc. and answer the below. (AS 3)

a) Why do they float on water?


b) What make them float?


c) Are there any other reasons for their floating?


d) Draw a diagram of what you have observed under microscope?

 4

What special adaptations can be seen in the following organisms? (AS1)

a) Mangrove trees


b) Camel


c) Fish


d) Dolphins


e) Planktons

 6

Marine water fishes drink more water than fresh water fishes. Do you agree? Justify.

 7

Visit a nearby pond or a lake. Record the organisms you have observed and their adaptations? (AS 4)