Q3: A dry filter paper can absorb water and solution of mineral salts. Is it carrying out nutrition? Justify
Answers
Answer:The wild edible vegetables contribute to the major portion of human diet that provides the essential biochemical's like carbohydrate, protein and lipids. These wild edibles not only contribute to the essential biochemical's and energy requirement but also act as supplementary sources of vitamins and minerals that are indispensable requirement of the body to maintain the proper physiological homoeostasis of the body. Nutritional qualities of wild edibles are comparable and sometimes superior to the domesticated variety (Ebert, 2014). More recently, several researches are focussed on wild edibles as source of food (Narzary et al., 2015; Abdus Satter et al., 2016; Seal et al., 2017a) and medicine, used for the treatment of different diseases like diabetes, jaundice, wounds, cancer etc. as established from different ethno pharmacological studies (Mir, 2014). It has been established that oxidative stress is associated with induction of many chronic and degenerative diseases including atherosclerosis, diabetes, cancer, immunosuppression, neurodegenerative diseases and others (Young and Woodside, 2001). The study of antioxidant activity of medicinal plants and vegetables strongly supports the idea that plant constituents can exert protective effects against oxidative stress in biological systems (Cao et al., 1996). The use of synthetic antioxidants like butylated hydroxyl toluene, butylated hydroxyl anisole and tertiary butyl hydroquinone appeared more effective but continuous usage is associated with cancer and other side effects (Branen, 1975). Therefore there is an increased interest in the search of natural antioxidant sources. Plants based secondary metabolites such as phenolic acids, tannins, alkaloids, flavonoids, terpenoids, lignin, quinones, coumarins, amines and others are the best potential antioxidants (Zheng and Wang, 2001; Cai et al., 2003).
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