Most appropriate definition of tissue is

Options

A. they are composed of only one type of cells
B. only one type of cells responsible to perform one common function is called tissue
C. a group of one or more type of cells performing one common function is called tissue
D. none of the above

Answer

To determine the most appropriate definition of tissue, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Concept of Tissue**:
- A tissue is a group of cells that work together to perform a specific function. This is the foundational understanding of what a tissue is.

2. **Analyzing the Options**:
- **Option 1**: "They are composed of only one type of cells."
- This statement is incorrect because tissues can consist of one or more types of cells.

- **Option 2**: "Only one type of cell responsible to perform one common function is called tissue."
- This is also incorrect. While some tissues are composed of a single cell type, this definition excludes those tissues that are made up of multiple cell types working together.

- **Option 3**: "A group of one or more types of cells performing one common function is called tissue."
- This statement is correct. It encompasses both simple tissues (made of one type of cell) and complex tissues (made of multiple cell types) that work together for a common purpose.

- **Option 4**: "None of the above."
- Since we have identified a correct definition in Option 3, this option is not valid.

3. **Conclusion**:
- After evaluating all the options, the most appropriate definition of tissue is: "A group of one or more types of cells performing one common function is called tissue."

### Final Answer:
The most appropriate definition of tissue is: **"A group of one or more types of cells performing one common function is called tissue."**

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