Body fluids of shark and coelacanths can be termed as

Options

A. Hyperosmotic and hypoionic to sea water
B. Hypersomtic and hyperionic to sea water
C. Hyposmotic and hypotonic to sea water
D. Hyposmotic and hyperionic to sea water

Answer

To determine the correct terminology for the body fluids of sharks and coelacanths in relation to seawater, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Environment**:
- Sharks and coelacanths are marine organisms that live in seawater, which has a high concentration of salt.

2. **Osmoregulation**:
- These fish have adaptations for osmoregulation, which is the process of maintaining the proper balance of salts and water in their bodies despite the salty environment.

3. **Body Fluid Composition**:
- The body fluids of sharks and coelacanths contain high concentrations of urea, which helps them to be less affected by the surrounding seawater.

4. **Comparing Osmotic Pressure**:
- To understand whether their body fluids are hyperosmotic, hypoosmotic, or isoosmotic to seawater, we need to consider the concentration of solutes (like urea and salts) in their body fluids compared to seawater.
- Since their body fluids are more concentrated than seawater due to the presence of urea and other solutes, they are considered hypertonic to seawater.

5. **Conclusion**:
- Therefore, the body fluids of sharks and coelacanths can be termed as **hypoosmotic and hyperionic to seawater**. This means their fluids have a lower osmotic pressure compared to seawater, but a higher concentration of ions.

### Final Answer:
The body fluids of sharks and coelacanths can be termed as **hypoosmotic and hyperionic to seawater**.

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