| 1. | the swimming of spermatozoa in humans | 
| 2. | maintenance of water current in the canal system of sponges | 
| 3. | locomotion of Protozoans like Euglena | 
| 4. | movement of plasmodia in slime moulds | 
| I: | Repeated activation of muscles can lead to fatigue. | 
| II: | Repeated activation of muscles can lead to accumulation of lactic acid. | 
| 1. | acromion | 2. | glenoid cavity | 
| 3. | spine | 4. | scapular notch | 
| I: | the ‘I’ bands get reduced | 
| II: | the ‘A’ bands retain the length | 
A motor neuron along with all the muscle fibers innervated by it constitute a:
| 1. | Fascicle | 2. | Motor end plate | 
| 3. | Motor unit | 4. | Myoneural junction | 
| Statement I: | The total number of bones in each upper limb is less than the number of bones in each lower limb. | 
| Statement II: | The number of carpals in each upper limb is lower than the number of tarsals in each lower limb. | 
| 1. | Statement I is correct; Statement II is correct | 
| 2. | Statement I is correct; Statement II is incorrect | 
| 3. | Statement I is incorrect; Statement II is correct | 
| 4. | Statement I is incorrect; Statement II is incorrect | 
 
| I: | 1 has condyles and articulates with first vertebra, 10 are floating ribs | 
| II: | 2 articulates with acetabulum, 5 articulates with glenoid cavity | 
| III: | 3 is radius, 4 is ulna, 7 is fibula, 8 is tibia | 
| IV: | 9 shows thoracic vertebrae | 
| Statement I: | Bone and cartilage are specialised connective tissues. | 
| Statement II: | The cartilage has a very hard matrix due to calcium salts in it and the bone has slightly pliable matrix due to chondroitin salts. | 
| 1. | Statement I is correct; Statement II is correct | 
| 2. | Statement I is correct; Statement II is incorrect | 
| 3. | Statement I is incorrect; Statement II is correct | 
| 4. | Statement I is incorrect; Statement II is incorrect |