Define the following, (a) Nutrients (b) Nutrition (c ) Micronutrients (d) Macronutrients (e ) Active absorption (f) Passive absorption (g) Symplastic pathway (h) Apoplastic pathway

Explanation

(a) The various inorganic and organic chemical substance (such as carbon dixoide, minerals, carbohydrates, proteins fats etc) required by living organism for their life activites are called nutrients, (b) Requirement and utilization of various nutrients by living organsims for their growth, developement, structure and body functions is called nutrition, (c ) See text, (d ) See text, (e ) Absorption involving carrier mechanism and direct expenditure of metabolic energy is called active absorption, (f) Absorption of elements and substances by physical processes not involving direct expenditure of metabolic energy is called passive absorption,(g) Translocation of ions through the cytoplasm of cells is called symplast pathway, (h) Translocation of ions through cell wall polysaccharides of cells is called apoplast pathway,