Q1 of 18 Page 146

What do you understand by adaptations in organisms and why do they adapt? (AS 1)

An adaptation of an organism is the modification or change in the organism's body or behavior that helps it to survive. Animals adapt to their environment so that they can perform a task easily or to provide them with an easier method of survival.


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2

With the help of two examples, explain how these organisms have adapted themselves in the ecosystem? (AS1)

 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

 5

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