SSC MTS EXAM

SSC

BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Why do some root cells have root hairs?
A
for the maintenance of the temperature of the cell sap
B
to increase the surface area of the cells
C
to increase the volume of the cell sap
D
to provide a place for cell nuclei
Explanation: 

Detailed explanation-1: -Root hairs are the small tubular extensions of the root surface which help in the absorption of water and minerals from the soil. It increases the surface area for absorption. More number of root hairs will increase the surface area and increase water absorption also.

Detailed explanation-2: -Because they vastly increase the root surface area and effectively increase the root diameter, root hairs are generally thought to aid plants in nutrient acquisition, anchorage, and microbe interactions (Hofer, 1991).

Detailed explanation-3: -They have the larger surface area to volume ratio which maximizes their ability to absorb water and mineral ions from the soil. Root hair cells also have plenty of mitochondria that releases energy from glucose during respiration so that the energy can be provided to the cell for active transport.

Detailed explanation-4: -Hyphae from the fungi extend from the mantle into the soil, which increases the surface area for water and mineral absorption. These hyphae greatly increase the surface area of the plant root, allowing it to reach areas that are not depleted of nutrients.

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