Barophillic prokaryotes

Options

A. Occur in water containing high concentration of barium hydroxide
B. Grow slowly in alkaline frozen lakes at high altitude
C. Grow and multiply in very deep marine sediments
D. Readily grow and divide in sea water enriched with soluble salt of barium.

Answer

**Step-by-Step Solution:**

1. **Understanding Barophilic Prokaryotes:**
- Barophilic prokaryotes are organisms that thrive in environments with high hydrostatic pressure. They are often found in deep-sea environments where the pressure is significantly greater than at sea level.

2. **Analyzing the Options:**
- **Option 1:** Occur in water containing high concentration of barium hydroxide.
- This option is incorrect because barophilic prokaryotes do not specifically require barium hydroxide for growth.

- **Option 2:** Grow slowly in alkaline frozen lakes at high altitude.
- This option is also incorrect as barophilic prokaryotes are not typically found in frozen lakes; they prefer deep marine environments.

- **Option 3:** Grow and multiply in very deep marine sediments.
- This option is correct. Barophilic prokaryotes are adapted to high-pressure environments, such as those found in deep marine sediments, like the Challenger Deep.

- **Option 4:** Radially grow and divide in seawater enriched with soluble salt of barium.
- This option is incorrect because barophilic prokaryotes do not specifically grow in seawater enriched with barium salts.

3. **Conclusion:**
- After analyzing all the options, the correct answer is **Option 3: Grow and multiply in very deep marine sediments.**