January 26, 2021
Question 1:
Why do organisms need water?
Answer 1:
Organisms need water for the following reasons:
(i) All cellular processes need water as a medium. Usually, the reactions that take
place in our body or within the cells occur between substances that are dissolved in water.
(ii) Since most of the substances are transported in a dissolved form, water is necessary.
Question 2:
What is the major source of fresh water in the city/town/village where you live?
Answer 2:
River is a major source of fresh water.
Question 3:
Do you know of any activity which may be polluting this water source?
Answer 3:
The discharge of waste water from homes, industries, hospitals, etc. into the river pollutes this
fresh water source.
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