Select a correct statement about histogen theory

Options

A. It was proposed by Hofmeister
B. Every histogen is specific in its function
C. Periblem forms the central mass of cells
D. Plerome gives rise to ground mass of cells

Answer

To select a correct statement about the histogen theory, we need to analyze the options provided and understand the key concepts of the histogen theory itself. Here’s a step-by-step solution:

### Step 1: Understand the Histogen Theory
The histogen theory was proposed by Hans Schott and it describes the organization of the apical meristem into three distinct layers or histogens, each responsible for different functions in the plant.

### Step 2: Identify the Histogens
The three histogens are:
1. **Dermatogen**: The outermost layer that gives rise to the epidermis (outer covering of the plant).
2. **Periblem**: The middle layer that forms the cortex and endodermis.
3. **Plerom**: The innermost layer that develops into the pith and primary vascular bundles (xylem and phloem).

### Step 3: Evaluate the Options
Now, let's evaluate the options provided in the question:
1. "It was proposed by Hofmester" - This is incorrect; it was proposed by Hans Schott.
2. "Every histogen is specific in its function" - This is correct; each histogen has a specific role.
3. "Periblem forms the central mass of cells" - This is incorrect; periblem does not form the central mass.
4. "Plerom gives rise to ground mass of cells" - This is misleading; plerom forms the pith and vascular bundles, not the ground mass.

### Step 4: Select the Correct Statement
Based on the evaluation, the correct statement about the histogen theory is: **"Every histogen is specific in its function."**

### Final Answer
The correct statement about histogen theory is: **"Every histogen is specific in its function."**

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