Match the following list of animals with their level of organization.
| Division of Labour | Animal | ||
| A. | Organ level | i. | Pheritima | 
| B. | Cellular aggregate level | ii. | Fasciola | 
| C. | Tissue level | iii. | Spongilla | 
| D. | Organ system level | iv. | Obelia | 
Choose the correct match showing division of labour with animal example:
| i | ii | iii | iv | |
| 1. | B | C | D | A | 
| 2. | B | D | C | A | 
| 3. | D | A | B | C | 
| 4. | A | D | C | B | 
Which of the following statements is not true about Nematodes?
1. They are bilaterally symmetrical, un-segmented worms
2. They are covered with a flexible, thick cuticle that is molted four times as they grow
3. They possess cilia or flagella on their reproductive cells
4. They possess a hydrostatic skeleton