Q6 of 18 Page 146

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

Yes, marine water fishes drink more water than fresh water fishes as in the ocean saline water is there so the osmotic potential of the water is less than that of marine livestock so the water enters more to attain equilibrium where no more water enter into the body. So we can say the marine bodies take more water than a fresh water fish but not drink as water only helps them for respiration.


More from this chapter

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4

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

a) Mangrove trees


b) Camel


c) Fish


d) Dolphins


e) Planktons

 5

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

 7

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

 8

Draw a lake showing different zones. Why are they called so? (AS 5)