Differentiate between the following.
(a) Wildlife sanctuary and biosphere reserve
(b) Zoo and wildlife sanctuary
(c) Endangered and extinct species
(d) Flora and fauna

a) Wildlife sanctuaries are the natural habitats of animals where poaching or capturing of animals is strictly prohibited. Harvesting and other man activities are allowed as long as they don’t interfere with well being of animals. Biosphere reserve serves to conserve the biodiversity i.e., plants, animals, microbes as well as culture of that place. A biosphere reserve consists of many protected areas such as national parks, sanctuaries and lakes etc. 

b) Wildlife sanctuaries are the natural habitats of animals where poaching or capturing of animals is strictly prohibited. Harvesting and other man activities are allowed as long as they don’t interfere with well being of animals. Zoos are the artificial habitats of animals wherein animals are conserved for public view. Wildlife sanctuaries cover a large geographical area as compared to that of zoo. 

c) Species with number diminished to the level that put them at the verge of extinctions are categorized as endangered species. Protection and conservation of these species are required to ensure their survival. Examples: tiger, wild buffaloes. Extinct species are the one which are no longer present on the earth e.g., Dodo

d) All plant species of an area constitutes its flora while its entire animal species makes its fauna.