The process of growing plants in a sterile nutrient medium under controlled conditions is called:
A. Cloning
B. Hybridization
C. Genetic engineering
D. Tissue culture
Answer: Option D
Solution (By JKSSB Mock Tests)
Tissue culture is a technique where plant cells, tissues, or organs are grown on a synthetic nutrient medium (like MS medium) under aseptic conditions to regenerate whole plants. It exploits totipotency. It is used for micropropagation, production of disease-free plants, and conservation. Cloning produces genetically identical individuals, genetic engineering alters DNA, hybridization crosses different varieties.
Explanation:
Zinc is a micronutrient (trace mineral) required in small amounts for enzyme function, immune response, and wound healing. Sodium, potassium, and phosphorus are macrominerals.
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