Biology teacher

  Class 11 Biology: Important Short Answer Question Evolution of biological classification systems from simple habitat-based grouping to modern DNA-based phylogenetic classification. - Dr.Sanjaykumar Pawar  Question: Why are the classification systems changing every now and then? Elaborate with examples of how criteria have shifted over time. (3 Marks — CBSE Board Pattern) Topper’s Exemplary Answer Classification systems are not fixed; they keep changing because biology is a dynamic science. With continuous discoveries of new organisms and advancements in technology, especially in genetics and microscopy, our understanding of evolutionary relationships keeps improving, which leads to revisions in older classification systems. The criteria for classification have changed gradually through different stages: Initial Stage (Habit & Habitat): Early classification systems, such as that of , were based on simple observable features like habitat (land, water, air) or hab...