Select the incorrect statement from the following.

Options

A. Diatoms are microscopic and float passively in water.
B. 'Diatomaceous earth' is formed by the cell wall of diatoms , which got deposited in ocean beds.
C. Diatoms are chief producers in the oceans.
D. The wall of diatoms are easily destructible

Answer

To solve the question, we need to evaluate each of the provided statements about diatoms and identify the incorrect one. Let's break down the statements step by step:

1. **Statement 1**: "Diatoms are microscopic and float passively in water."
- **Evaluation**: This statement is correct. Diatoms are indeed microscopic organisms that float in water due to their small size and buoyancy.

2. **Statement 2**: "Diatomaceous earth is formed by the cell wall of diatoms, which got deposited in ocean beds."
- **Evaluation**: This statement is also correct. Diatomaceous earth is formed from the silica-rich cell walls of dead diatoms that accumulate on the ocean floor.

3. **Statement 3**: "Diatoms are chief producers in the ocean."
- **Evaluation**: This statement is correct as well. Diatoms are primary producers, meaning they perform photosynthesis and contribute significantly to the ocean's primary productivity.

4. **Statement 4**: "The walls of diatoms are easily destructible."
- **Evaluation**: This statement is incorrect. The cell walls of diatoms are made of silica, which makes them quite durable and not easily destructible.

Based on the evaluations, the incorrect statement is:

**Answer**: The walls of diatoms are easily destructible.