Match the following list of animals with their level of organisation.
`{:("Division of Labour","Animal"),(A."Organ level",i."Pheretima"),(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.

Options

A. i-B,ii-C, iii-D and iv-A
B. i-B,ii-D, iii-C and iv-A
C. i-D,ii-A, iii-B and iv-C
D. i-A,ii-D, iii-C and iv-B

Answer

To solve the problem of matching the levels of organization with the respective animals, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Levels of Organization**:
- **Organ Level**: This level involves the organization of tissues into organs that perform specific functions.
- **Cellular Aggregate Level**: This level is characterized by a collection of cells that work together but do not form true tissues.
- **Tissue Level**: This level involves the organization of similar cells into tissues that perform a specific function.
- **Organ System Level**: This level involves multiple organs working together to perform complex functions.

2. **Identify the Animals**:
- **Pheretima**: This is the scientific name for the earthworm, which belongs to the phylum Annelida.
- **Fasciola**: This is a liver fluke, which belongs to the phylum Platyhelminthes.
- **Spongilla**: This is a freshwater sponge, which belongs to the phylum Porifera.
- **Obelia**: This is a colonial organism belonging to the phylum Cnidaria.

3. **Match Each Level of Organization with the Correct Animal**:
- **A. Organ Level**: This is found in Fasciola (liver fluke) from the phylum Platyhelminthes.
- **B. Cellular Aggregate Level**: This is found in Spongilla (sponge) from the phylum Porifera.
- **C. Tissue Level**: This is found in Obelia (a colonial organism) from the phylum Cnidaria.
- **D. Organ System Level**: This is found in Pheretima (earthworm) from the phylum Annelida.

4. **Final Matching**:
- A. Organ Level → ii. Fasciola
- B. Cellular Aggregate Level → iii. Spongilla
- C. Tissue Level → iv. Obelia
- D. Organ System Level → i. Pheretima

### Final Answer:
- A → ii (Fasciola)
- B → iii (Spongilla)
- C → iv (Obelia)
- D → i (Pheretima)