A great video lecture conducted by experienced biology teacher on 11th class biology chapter 1 topic1 biology and the service to mankind protection and conservation to environment. Get full understanding or ask any questions.
Biology services in food production and preservation, ch 1, lec 4, Biology and the Service to Mankind & Protection and Conservation to Environment - Inter Part 1 Biology
Biology and the Service of Mankind, ch 1, lec 4, Biology and the Service to Mankind & Protection and Conservation to Environment - Inter Part 1 Biology
Biology and Service to Mankind and Protection and Conservation to Environment, ch 1, lec 4, Biology and the Service to Mankind & Protection and Conservation to Environment - Inter Part 1 Biology