How many of the given statements are correct w.r.t meristmatic tissues?
A. The meristems which occur at the tips of roots and shoots are primary meristems.
B. Some cells 'left behind ' from the shoot apical meristem constitutes the accessory bud.
C. Cork cambium is responsible for producing secondary tissues.
D. The process of formation of structurally and functionally specialised cells is known as dedifferentiation.
E. The intercalary meristem occurs in grasses and regenerates parts removed by grazing herbivore.
F. Interfascicular cambium and fascicular vascular cambium are absent in woody plant axis.

Options

A. Two
B. Three
C. Four
D. Five

Answer

To determine how many of the given statements regarding meristematic tissues are correct, we will analyze each statement one by one.

### Step-by-Step Solution:

1. **Statement A**: "The meristems which occur at the tips of roots and shoots are primary meristems."
- **Analysis**: This statement is correct. The meristems located at the tips of roots and shoots are known as apical meristems, which are indeed classified as primary meristems. They are responsible for the primary growth of the plant.

2. **Statement B**: "Some cells 'left behind' from the shoot apical meristem constitute the accessory bud."
- **Analysis**: This statement is also correct. The shoot apical meristem continuously divides, and some of the cells that are left behind can develop into accessory buds.

3. **Statement C**: "Cork cambium is responsible for producing secondary tissues."
- **Analysis**: This statement is incorrect. Cork cambium primarily produces cork, which is a protective tissue, but it does not produce secondary tissues in general.

4. **Statement D**: "The process of formation of structurally and functionally specialized cells is known as dedifferentiation."
- **Analysis**: This statement is incorrect. The process described is known as differentiation, not dedifferentiation. Dedifferentiation refers to the process where specialized cells revert to a meristematic state.

5. **Statement E**: "The intercalary meristem occurs in grasses and regenerates parts removed by grazing herbivores."
- **Analysis**: This statement is correct. Intercalary meristems are found in grasses and are responsible for the regrowth of parts that may be removed by grazing.

6. **Statement F**: "Interfascicular cambium and fascicular vascular cambium are absent in woody plant axis."
- **Analysis**: This statement is incorrect. Both interfascicular cambium and fascicular vascular cambium are present in woody plants and are involved in secondary growth.

### Summary of Correct Statements:
- Correct Statements: A, B, and E.
- Incorrect Statements: C, D, and F.

### Conclusion:
Out of the six statements, three statements (A, B, and E) are correct.

### Final Answer:
**Three statements are correct.**

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