Crystals of calcium carbonate forming bunches in the epidermal cells of certain leaves are

Options

A. Cystoliths
B. Raphides
C. Sphaeraphides
D. Otoliths

Answer

To solve the question regarding the crystals of calcium carbonate that form bunches in the epidermal cells of certain leaves, we will analyze each of the options provided.

### Step-by-Step Solution:

1. **Understanding the Question**:
- We need to identify the type of crystals of calcium carbonate that are found in the epidermal cells of certain leaves.

2. **Analyzing the Options**:
- **Option 1: Crystoliths**:
- Crystoliths are mineral crystals that can be found in plant cell walls, specifically composed of calcium carbonate. They are known to occur in the epidermal cells of certain plants.
- This option is relevant to the question as it directly relates to the presence of calcium carbonate in the epidermal cells.

- **Option 2: Rephites**:
- Rephites are needle-shaped crystals of calcium oxalate, not calcium carbonate. Therefore, this option does not fit the question.

- **Option 3: Spherophytes**:
- Spherophytes refer to spherical aggregations of rapids (another form of calcium oxalate) in plant cells. This does not pertain to calcium carbonate, making it an incorrect option.

- **Option 4: Otoliths**:
- Otoliths are structures found in the inner ear of vertebrates that are made of calcium carbonate. They are not related to plant cells, thus making this option incorrect.

3. **Conclusion**:
- After analyzing all the options, the correct answer is **Crystoliths**. These are the crystals of calcium carbonate that form bunches in the epidermal cells of certain leaves.

### Final Answer:
The crystals of calcium carbonate forming bunches in the epidermal cells of certain leaves are **Crystoliths**.

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