Advertisements
Advertisements
Question
Why do organisms need water?
Advertisements
Solution
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.
APPEARS IN
RELATED QUESTIONS
Give one word for the following statement :
The change of states of water from one form to another .
How are clouds formed?
Water exists in all three states. Discuss.
Explain why rivers and lakes do not freeze easily.
Complete the statement by filling the blank with the correct word from the option.
Solubility of most solids ___ with rise in temperature.
What is meant by the term ‘oil spill’?
Look at the map of Tamilnadu showing annual rainfall and answer the questions given below
- Identify the districts that get only low annual rainfall in Tamilnadu.
- Identify the districts that get a medium annual rainfall in Tamilnadu.
- State the districts that enjoy high annual rainfall in Tamilnadu.
Rivers from land, add minerals to seawater. Discuss how?
Complete the following chart by writing appropriate words in the boxes marked (a) to (e).
Match the items of Column I with the items of Column II with reference to sewage.
| Column I | Column II | ||
| (a) | Inorganic impurities | (i) | phosphorus and nitrogen |
| (b) | Organic impurities | (ii) | nitrates and phosphates |
| (c) | Nutrients | (iii) | cholera and typhoid |
| (d) | Bacteria | (iv) | pesticides and herbicides |
