Question

Choose the incorrect statement among the following

• A. Parenchymatous cells usually present in cortex and pericycle of monocot stem.
• B. Closed vascular bundles can not form secondary tissues.
• C. Vessels are devoid of protoplasm and are connected with perforations.
• D. Xylem conducts water and mineral from root to shoots

Hint:

Remember key anatomical differences between monocot and dicot stems. Monocot stems typically lack distinct cortex and pericycle regions, having a general ground tissue instead, and their vascular bundles are scattered and closed (lacking cambium). Dicot stems have distinct cortex, pericycle, and open vascular bundles arranged in a ring, allowing for secondary growth.

Answer 1

The Correct Option is A

Step 1: Analyze Statement (1)
Statement (1) says: "Parenchymatous cells usually present in cortex and pericycle of monocot stem."
In monocot stems, the ground tissue (which includes cortex and pericycle) is generally undifferentiated, meaning there isn't a distinct cortex or pericycle like in dicot stems. The vascular bundles are scattered throughout the ground tissue, which is primarily parenchymatous. While parenchyma cells are abundant in the ground tissue of monocot stems, the distinct regions of "cortex" and "pericycle" as separate layers are typically absent or poorly defined. Monocot stems typically have a large, undifferentiated ground parenchyma. Hence, this statement is likely Incorrect. Step 2: Analyze Statement (2)
Statement (2) says: "Closed vascular bundles can not form secondary tissues."
Closed vascular bundles (found in monocots) lack cambium. Cambium is the meristematic tissue responsible for producing secondary xylem and secondary phloem (secondary growth). Since closed vascular bundles do not have cambium, they are indeed incapable of forming secondary tissues and undergoing secondary growth. This statement is Correct. Step 3: Analyze Statement (3)
Statement (3) says: "Vessels are devoid of protoplasm and are connected with perforations."
Vessels are components of xylem. Mature vessel elements (vessel members) are dead cells, meaning they are devoid of protoplasm. They are arranged end-to-end to form long tubes, and their end walls have perforations (pores) that allow for continuous water flow, forming a continuous pipeline. This statement is Correct. Step 4: Analyze Statement (4)
Statement (4) says: "Xylem conducts water and mineral from root to shoots."
Xylem is the primary water-conducting tissue in plants. Its main function is to transport water and dissolved mineral nutrients absorbed by the roots upwards to the stem, leaves, and other aerial parts of the plant. This statement is Correct. Step 5: Identify the incorrect statement
Based on the analysis:
Statement (1) is Incorrect.
Statement (2) is Correct.
Statement (3) is Correct.
Statement (4) is Correct.
Therefore, the incorrect statement is (1).