NEET BIOLOGY

Detailed explanation-1: -In plants, each part can independently take in oxygen from the air and give out carbon dioxide. Like all other living cells of the plants, the root cells take up air from the air spaces present between the soil particles.

Detailed explanation-2: -However, while the crown of a tree is usually surrounded by open air, roots need a source of oxygen in the soil in order to grow. In the ground, air and water are held in little pockets called soil pores. If the soil is dense and compacted (with no soil pores), there will not be enough oxygen available for respiration.

Detailed explanation-3: -Plant respiration happens not only in the leaves, but also through the root system. In root systems, oxygen (O2) in soil pores diffuses into the root hairs and gets transported to all parts of the roots.

Detailed explanation-4: -Roots obtain oxygen from air in the soil for respiration. In the absence or deficiency of O2, root growth is restricted or completely stopped.

Detailed explanation-5: -During photosynthesis, plants take in carbon dioxide (CO2) and water (H2O) from the air and soil. Within the plant cell, the water is oxidized, meaning it loses electrons, while the carbon dioxide is reduced, meaning it gains electrons. This transforms the water into oxygen and the carbon dioxide into glucose.