Animals which are fixed like plants are

Options

A. Annelids
B. Sponges
C. Corals
D. Both B and C

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for animals that are fixed in one place, similar to plants. This means we are looking for organisms that do not move from their location and are attached to a surface.

2. **Defining Key Terms**:
- **Sessile Organisms**: These are organisms that are fixed in one place and do not move. They are often found in aquatic environments.
- **Motile Organisms**: These organisms can move from one place to another, such as earthworms or animals that use limbs for locomotion.

3. **Identifying Examples**:
- **Sponges**: Sponges are a type of sessile organism. They are fixed to surfaces and do not move. They obtain food through a process called filter feeding, where water passes through their bodies, allowing them to extract nutrients.
- **Corals**: Corals are also sessile organisms that attach to the substrate (like rocks) and do not move. They often have symbiotic relationships with algae, which help them obtain food.

4. **Analyzing the Options**:
- The question provides options, and we need to determine which of these represent sessile animals.
- **Option A (Annelids)**: This includes earthworms, which are motile and can move, so this option is incorrect.
- **Option B (Sponges)**: These are indeed sessile, so this option is correct.
- **Option C (Corals)**: Corals are also sessile, making this option correct as well.

5. **Conclusion**: The animals that are fixed like plants include sponges and corals. Therefore, the correct answer includes both sponges and corals.

**Final Answer**: The animals which are fixed like plants are sponges and corals.

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