CBSE Class 12-science Answered

(i) Biodiversity is the occurrence of different types of genes, gene pools, species, habitats and ecosystems in a particular space and various parts of earth. It is a matter of concern because species are continuously lost, limiting the diversity and this will affect our survival and well-being on earth due to the changes in environment.

(ii) (a) Red Data Book is a document in which the lists of species are published whose continued existence is threatened. 

(b) The basic utility is to create awareness about the importance of threatened biodiversity and to identify the endangered species.

(c) International Union of Conservation of Nature and Natural Resources (IUCN) publishes the Red Data Book. Now IUCN is called World Conservation Union.