| I: | Fibrinogens are needed for clotting or coagulation of blood. |
| II: | Globulins, primarily, are involved in the defense mechanisms of the body. |
| III: | The albumins help in osmotic balance. |
| 1. | Only I | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II and III |
| 1. | Albunims | 2. | Globulins |
| 3. | Fibrinogen | 4. | Angiotensinogen |
| Statement I: | RBCs are devoid of nucleus in humans and are biconcave in shape and in all other mammals have nucleus and are spherical in shape. |
| Statement II: | RBCs have an average life span of 120 days after which they are destroyed in the spleen (graveyard of RBCs). |
| I. | Neutrophils are the most abundant cells (60-65 percent) of the total WBCs. |
| II: | Basophils are the least (0.5-1 percent) of the total WBCs. |
| III: | Neutrophils and monocytes (6-8 percent) are phagocytic cells. |
| IV: | Basophils secrete histamine, serotonin, heparin, etc., and are involved in inflammatory reactions. |
| V: | Eosinophils (2-3 percent) resist infections and are also associated with allergic reactions. |
| VI: | Lymphocytes (20-25 percent) are responsible for immune responses of the body. |
| 1. | 3 | 2. | 4 |
| 3. | 5 | 4. | 6 |
| a. | the blood type is decided by the presence or absence of two surface antibodies on the RBCs namely anti-A and anti-B. |
| b. | the plasma of different individuals contain two natural antigens. |
| c. | a person with blood group A can receive blood either from a person with blood group O or from a person with blood group AB. |
| d. | a person with blood group A can donate blood either to a person with blood group O or to a person with blood group A. |
| I: | is released out as the blood passes through the capillaries in tissues leaving the larger proteins and most of the formed elements in the blood vessels. |
| II: | has nearly the same mineral distribution as that in plasma. |
| Assertion (A): | Open circulatory system is considered to be more advantageous than the closed circulatory system. |
| Reason (R): | Open circulatory system is present in arthropods and molluscs, two of the most successful animal phyla. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 4. | (A) is False but (R) is True. |