Question

B. Write T for the True and F for the False statements. Correct the false statements.
1. All microorganisms are harmful and cause diseases in plants and animals.
2. Pathogens enter the body of a healthy person through air and water only.
3. When antibiotics are injected within a human body, the body produces substances
called vaccines.
4. In nature, nitrogen is fixed during lightning or by nitrogen-fixing bacteria and blue
green algae.
5. When plants and animals die, sulphur in their bodies is decomposed and returned to
the air.
6. Grazing by cattle causes a disease called fin rot.
7. Foul odour is the only symptom that shows that a food has become unfit for consumption.
8. Boiling involves removal of water from food items.
9. Pasteurization involves heating a foodstuff to a high temperature and then cooling it
rapidly.
10. All diseases are communicable diseases, caused by pathogens.​

Answer 1

Answer:

1)F

2)F

3)F

4)T

5)F

6)T

7)F

8)T

9)F

10)F

Answer 2

Answer:

1.F

2.T

3.T

4.T

5.F

6.T

7.T

8.F

9.F

10.F