The fourth chapter, " Diversity In Living Organisms", introduces students to the concept of Biodiversity. It is about the different kinds of living organisms living together on earth and sharing a co-relationship. This co-relationship is called Biodiversity. The chapter brings to the forefront the topic of taxonomy, a branch of Biology that separately identifies, names, and classifies all kinds of organisms present on earth. Here the students learn about the classes and classification of different animals and plants. This chapter discusses the organisms classified based on evolution, geographical conditions, and nature. The classes are derived based on kingdom, order, species, genus, and family. This chapter deals with the entire taxonomy and zoology.
The chapter mentions the drawbacks of the two kingdom classification and the reason behind the currently accepted five-kingdom classification. These include the Monera, Protista, Fungi, Plantae, and Animalia. These kingdoms are further divided into phylum, then to class, followed by order, family, genus, and species.
The chapter is smartly designed in Lakhmir Singh Solutions For Class 9 Biology. The chapter in the solutions PDF is based on a format of questions and answers. It contains many questions that comprise short, very short, long answer questions, fills in the blanks, and Multiple Choice questions. The concepts are described in a very simple and easy language to grasp fast. All the answers are written keeping in mind the difficulties a student can face while learning them. The solutions PDF contains all the questions that comply with the chapters in the textbook. The student needs to study both the books and the solutions, and they will be prepared for all kinds of exams. The book contains many pictures and diagrams that maintain the focus and interests of the student while studying. The book and the solutions pdf are the best student guide that a student can ask for.