The site/s where most of the uptake of water and minerals take place is/are__________?
Correct answer: A. Root hairs
- A. Root hairs
- B. Root cells
- C. Underground stem
- D. All of these
Explanation
Root hairs greatly increase the surface area in contact with the soil and have thin walls, making them the main sites for water and mineral absorption. Students may choose b because absorption occurs in root cells generally, but root hairs are the specialised cells responsible for most uptake.
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About Biological Importance of Water
Water supports life through its polarity, hydrogen bonding and ability to dissolve ionic and polar substances. Its high specific heat, heat of vaporization, cohesion, adhesion and incompressibility help regulate temperature, transport materials and maintain structure, while hydrolysis and osmosis depend directly on water.
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