Read the following statements. (A)All the protochordates are marine.(B) Urochordates have tunic or test.(C)Urochordate reproduces both asexually and sexually.(D)Cephalochordates do not have respiratory pigmentHow many of the above mentioned statements are correct?

Options

A. Only (A)
B. Only (B)
C. (A),(B)&(C) only
D. (A), (B), (C) & (D)

Answer

To determine how many of the statements about protochordates are correct, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement A: All the protochordates are marine.**
- Protochordates, which include urochordates and cephalochordates, primarily inhabit marine environments. This statement is **correct**.

2. **Statement B: Urochordates have tunic or test.**
- Urochordates, also known as tunicates, are characterized by a protective outer covering called a tunic or test. This statement is **correct**.

3. **Statement C: Urochordate reproduces both asexually and sexually.**
- Urochordates are known to reproduce both sexually (as they have both male and female gametes) and asexually (by budding in some species). This statement is **correct**.

4. **Statement D: Cephalochordates do not have respiratory pigment.**
- Cephalochordates, such as lancelets, do not possess respiratory pigments like hemoglobin. Instead, they rely on the diffusion of oxygen through their body surface. This statement is **correct**.

### Conclusion:
All four statements (A, B, C, and D) are correct. Therefore, the answer is that **4 statements are correct**.