Explanation
Oxygen deprivation in roots normally causes a sudden drop in active absorption of minerals. Therefore, the correct option is A: Active Absorption of Minerals.
Active absorption of minerals is a process that requires energy, usually in the form of ATP, to move minerals from an area of low concentration to an area of high concentration against the concentration gradient. This process is carried out by specialized proteins in the plasma membrane of root cells.
Roots require oxygen to carry out cellular respiration, which produces ATP to power active absorption of minerals. When the roots are deprived of oxygen, they are unable to produce ATP, and the active absorption of minerals is reduced. As a result, the plant may experience nutrient deficiencies, which can lead to stunted growth, yellowing of leaves, and other symptoms of stress. Passive absorption of minerals, which does not require energy, may still occur to some extent, but it is not sufficient to meet the plant's nutrient requirements.
