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Find out the incorrect statement...

Find out the incorrect statement

A

Growth by apposition is particularly obvious in secondary walls

B

Thin areas in primary wall are called primary pit fields

C

Pit membrane of bordered pit pair has torus in the centre

D

Deposition of secondary wall keeps pace with cell enlargement

Text Solution

AI Generated Solution

The correct Answer is:
To find the incorrect statement among the given options, we will analyze each statement one by one. ### Step-by-Step Solution: 1. **Analyze Option 1**: - **Statement**: "Growth by upper position is particularly obvious in secondary walls." - **Explanation**: Upper positional growth refers to the addition of new layers of the cell wall. This is indeed more pronounced in secondary walls, which are formed after the primary walls and are located between the plasma membrane and the primary cell wall. - **Conclusion**: This statement is **correct**. 2. **Analyze Option 2**: - **Statement**: "Thin areas in primary walls are called as primary pit fields." - **Explanation**: Primary pit fields are regions in the primary cell wall where the wall is thinner, allowing for communication between adjacent cells. This definition aligns with the statement. - **Conclusion**: This statement is **correct**. 3. **Analyze Option 3**: - **Statement**: "Pit membrane of border pit pair has torus in the center." - **Explanation**: In border pit pairs, the pit membrane does indeed contain a structure called the torus, which is surrounded by a permeable region known as the margo. This is a common feature in vascular plants. - **Conclusion**: This statement is **correct**. 4. **Analyze Option 4**: - **Statement**: "Deposition of secondary wall keeps pace with cell enlargement." - **Explanation**: Secondary walls are deposited only after the cell has stopped enlarging. Therefore, this statement is incorrect because secondary wall deposition does not occur simultaneously with cell enlargement; it occurs afterward. - **Conclusion**: This statement is **incorrect**. ### Final Answer: The incorrect statement is **Option 4**: "Deposition of secondary wall keeps pace with cell enlargement." ---
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