EVERYDAY SCIENCE

SCIENCE

BOTANY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Why do lateral roots form from the center of the root instead of the outer edge like the root hairs?
A
So they are stronger.
B
So they grow faster.
C
So the water absorbed in the lateral root can connect directly to the main xylem.
D
They don’t form in the center of the root.
Explanation: 

Detailed explanation-1: -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 (Cutter, 1978; Hofer, 1991).

Detailed explanation-2: -The numerous root hairs provide a large surface area. The more the surface area, the greater is the absorption. The cell wall is freely permeable and the cell membrane is semi-permeable. Root hair contains cell sap which is of a higher concentration than the surrounding soil water.

Detailed explanation-3: -Lateral roots originate from mature, nondividing pericycle cells within the parent root. Pericycle cells are unique in that they are arrested in the G2 phase of the cell cycle (Beeckman et al., 2001). Some unknown signal triggers groups of pericycle cells to reenter the cell cycle and become lateral root founder cells.

Detailed explanation-4: -They differ in roles. The lateral roots are roots that spread for two purposes-to gather water and nutrients and to anchor the plant while root hairs are primarily to increase the surface area of the roots to gather water and minerals faster.

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