Online Teaching By Suleman

  Biological Classification - Chapter 3 Lecture 2 - Grade 9 - Biology - Online Teaching By Suleman There is a large collection of very dissimilar forms of organisms, found on Earth. Over 1.5 million types of animals and over 0.5 million types of plants are known to biologists and these are only a small percentage of the total types estimated to live on Earth. They range in complexity from small and simple bacteria to large and complex human beings. Some of them live in sea, some on land; some walk, others fly, and still others are stationary. Each has its own way of life i.e. getting food, avoiding unfavourable environmental conditions, finding a place to live, and reproducing its kind. When there are so many diverse kinds of organisms, it becomes difficult to learn about the characteristics of each. To study such a large collection, biologists classify the organisms into groups and subgroups and for this task they require some system. Biological classification is a method by which...