AP BIOLOGY

Detailed explanation-1: -Micronutrients are those that the body needs in smaller amounts, whereas macronutrients are those that the body needs in larger amounts. Every plant needs a little amount of chlorine, which is an essential micronutrient.

Detailed explanation-2: -Chlorine (Cl) occurs predominantly as Cl-in soil and plant. It is an essential micronutrient of higher plants and participates in several physiological metabolism processes.

Detailed explanation-3: -Chlorine is mostly absorbed as Cl-in soil and plants. It is an essential micronutrient for plants as it participates in several physiological activities like stomatal regulation, transport of nutrients, activates several enzyme systems, etc.. It is required for water-splitting during photosynthesis.

Detailed explanation-4: -Micronutrients can be divided into four groups-water-soluble vitamins, fat-soluble vitamins, macrominerals and trace minerals.

Detailed explanation-5: -There are 7 essential plant nutrient elements defined as micronutrients [boron (B), zinc (Zn), manganese (Mn), iron (Fe), copper (Cu), molybdenum (Mo), chlorine (Cl)].