Which of the following statements regarding apical meristem is incorrect?

Options

A. It brings about increase in length of the root and stem.
B. It develops by dedifferentiation of permanent tissues
C. It constitutes primary meristem.
D. None of these

Answer

To determine which statement regarding apical meristem is incorrect, we can follow these steps:

### Step 1: Understand what apical meristem is
Apical meristem is a type of meristematic tissue found at the tips of roots and shoots in plants. It is responsible for the increase in length of these parts, allowing for vertical growth.

**Hint:** Look for the location and function of apical meristem in plants.

### Step 2: Review the characteristics of meristematic tissue
Meristematic tissue consists of living cells that are capable of continuous division. This characteristic is crucial for the growth of plants.

**Hint:** Remember that meristematic tissues are involved in growth and are made up of living cells.

### Step 3: Analyze the statements provided
1. **It brings about an increase in length of root and stem.** - This statement is true because apical meristem is responsible for the elongation of roots and stems.

2. **It develops by the de-differentiation of permanent tissue.** - This statement is also true. When permanent tissues undergo de-differentiation, they can form secondary meristem, but this is not how apical meristem develops.

3. **It constitutes primary meristem.** - This statement is incorrect. Apical meristem is not derived from permanent tissue; instead, it is a primary meristem itself, which originates from the promeristem.

4. **None of these.** - This statement implies that all previous statements are correct, which is not true since we identified one incorrect statement.

### Step 4: Identify the incorrect statement
From the analysis, the statement "It constitutes primary meristem" is incorrect. Apical meristem is a type of primary meristem, not something that constitutes it.

**Final Answer:** The incorrect statement regarding apical meristem is: "It constitutes primary meristem."

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