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Four statements regarding root hairs are...

Four statements regarding root hairs are given below. Choose the correct one from them
I) They are unbranched tubular extensions
II) They are fine, delicate thread like structures
III) They are present on tap root and absent in all adventitious roots
IV) They are uniformly distributed in all regions of root

Text Solution

AI Generated Solution

The correct Answer is:
To determine the correct statement regarding root hairs from the given options, we will analyze each statement step by step. ### Step 1: Analyze Statement I **Statement I:** They are unbranched tubular extensions. - **Analysis:** Root hairs are indeed unbranched structures that extend from the epidermal cells of the root. They serve to increase the surface area for absorption of water and nutrients. - **Conclusion:** This statement is **correct**. ### Step 2: Analyze Statement II **Statement II:** They are fine, delicate thread-like structures. - **Analysis:** Root hairs are typically very fine and resemble delicate threads. This description accurately reflects their morphology. - **Conclusion:** This statement is **correct**. ### Step 3: Analyze Statement III **Statement III:** They are present on tap root and absent in all adventitious roots. - **Analysis:** Root hairs are found on both tap roots and adventitious roots. They are not exclusive to one type of root system. Therefore, this statement is misleading. - **Conclusion:** This statement is **incorrect**. ### Step 4: Analyze Statement IV **Statement IV:** They are uniformly distributed in all regions of root. - **Analysis:** Root hairs are specifically found in the region of maturation where absorption occurs. They are not present in the regions of meristematic activity and elongation. Thus, they are not uniformly distributed. - **Conclusion:** This statement is **incorrect**. ### Final Conclusion The correct statements regarding root hairs are: - **I) They are unbranched tubular extensions.** - **II) They are fine, delicate thread-like structures.**
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