Question

Active uptake of minerals by root mainly depends on the
A. Availability of oxygen
B. Light
C. Temperature
D. Availability of carbon dioxide

Answer 1

Hint: Respiration by roots also takes place in plants. There is oxygenated air between the soil particles' air spaces. The root hair on the roots consumes oxygen in order to reach the roots. The hairs of the roots are in contact with them directly. Active absorption takes place in the region of low transpiration and well-watered areas.

Complete answer: Active absorption signifies absorption against the gradient of concentration. Energy input is needed in order to transfer any material such as a solution or solvent against the concentration gradient. The energy in the roots is acquired through cellular respiration behaviour. Active absorption, with the assistance of adenosine triphosphate produced by the root, is explained as the absorption of water by roots because the root cells are actively involved in the process. Permanent tissue is a type of plant tissue that has completed its growth and differentiation. Active root absorption of minerals requires the action of the roots themselves, which includes the roots' metabolic energy. Energy extraction takes place via the aerobic respiration process and oxygen is also very important for plants to consume minerals.
Thus, choice A- Availability of oxygen is the correct one.

Note: The perspiration pulls or tension, cohesion property of water, and hydration of the cell walls (i.e. adhesion) are fully responsible for the ascent of sap. Negative pressure or tension is generated and transmitted via the continuous water column inside the xylem to the root due to perspiration. The active absorption is carried out by two theories: the one is the active absorption of osmotic water and the second is the active absorption of non-osmotic water.