The alga Chara is called stonewort because its plant body is encrusted with

Options

A. Calcium bicarbonate
B. Calcium carbonate
C. Calcium chloride
D. Calcium oxalate

Answer

To answer the question "The alga Chara is called stonewort because its plant body is encrusted with," we can break down the solution into the following steps:

### Step-by-Step Solution:

1. **Identify the Alga**: The question refers to the alga Chara, which is a type of green algae belonging to the class Chlorophyceae.

2. **Understand the Term 'Stonewort'**: The term "stonewort" is derived from the characteristics of the plant body of Chara. It suggests that the plant has a hard, stone-like quality.

3. **Research the Composition**: Chara is known to have its plant body encrusted with certain minerals. The key mineral that gives Chara its stone-like quality is calcium carbonate.

4. **Confirm the Encrustation**: Calcium carbonate is a compound that can form hard deposits, which explains why Chara is referred to as stonewort. This encrustation contributes to its rigidity and structural integrity.

5. **Conclusion**: Therefore, the correct answer to the question is that Chara is called stonewort because its plant body is encrusted with calcium carbonate.

### Final Answer:
Chara is called stonewort because its plant body is encrusted with **calcium carbonate**.

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