Matthias Schleiden examined a sizable amount of plants and revealed the presence of

Options

A. a - cell which forms tissue
B. a nucleus inside the cell
C. a centromere in the chromosome
D. all of these

Answer

To solve the question regarding what Matthias Schleiden revealed about plants, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Scientist's Contribution**: Matthias Schleiden was a botanist known for his work on plant cells. He is one of the key figures in the development of cell theory.

2. **Understand the Context of His Findings**: Schleiden examined a large number of plants and concluded that all plant tissues are composed of cells. This was a significant finding in the study of botany and contributed to the understanding of plant biology.

3. **Evaluate the Options Provided**:
- **Option A**: A cell which forms tissue - This aligns with Schleiden's findings that plant tissues are made up of cells.
- **Option B**: A nucleus inside the cell - While cells do contain nuclei, this was not specifically highlighted by Schleiden in his research on plants.
- **Option C**: A centromere in the chromosome - This is more related to cell division and genetics, not specifically to Schleiden's contributions regarding plant tissues.
- **Option D**: All of these - This cannot be correct since not all statements are true based on Schleiden's work.

4. **Conclusion**: The correct answer is **Option A**: A cell which forms tissue. This reflects Schleiden's assertion that all plant tissues are composed of cells.

### Final Answer:
Matthias Schleiden examined a sizable amount of plants and revealed the presence of **a cell which forms tissue**.

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