| Statement A: | The use of vaccines and immunisation programmes have enabled us to completely eradicate small pox. |
| Statement B: | Vaccines are available for diphtheria and polio. |
| 1. | Both statements A and B are correct |
| 2. | Both statements A and B are incorrect |
| 3. | Only statement A is correct |
| 4. | Only statement B is correct |
| a. | Skin |
| b. | Macrophages and T-helper cells |
| c. | HCI in stomach |
| d. | Secretion of lacrimal glands |
| (a) | All parasites are pathogens as they cause harm to the host. |
| (b) | Pathogens have to adapt to live within the environment of the host. |
| (c) | Pathogen of amoebic dysentery lives in the gut of host organism. |
| (d) | Pathogens can enter human body by various means causing functional damage but do not interfere with normal vital activities. |
| (a) | The active chemicals are present in flower tops as well as in the resins of the plant whose leaf is depicted. |
| (b) | Ganja, coke and marijuana can be produced from it. |
| (c) | The chemicals extracted from the plant, when consumed, affect the brain activity and cause changes in mood, behaviour, etc. |
| 1. | Statements (a) and (b) are correct while statement (c) is incorrect. |
| 2. | Statements (a) and (c) are correct while statement (b) incorrect. |
| 3. | Statements (a) and (b) are incorrect while statement (c) is correct. |
| 4. | Statements (b) and (c) are incorrect while statement (a) is correct. |