subjectexpert blogs

          Science is the systemized knowledge derived from observations and experiments.  These  experiments are carried out to determine the principles about how nature operates. Scientists like chemists, biologists and physicists use the same scientific method to make and test new theories. In this chapter, we will study the steps of biological method. We will study malaria as an example to understand the steps in detail. 2.1 Biological Method Questions about living things have provided problems that man has investigated to aid his own survival and to satisfy his desire to know. The scientific method in which biological problems are solved, is termed as biological method . It comprises the steps a biologist adopts in order to solve a biological problem. Biological method has played an important part in scientific research for almost 500 years. From Galileo’s experiment (in the 1590s) to current research, the biological method has contributed to...

  Chapter 1|Biology 9th Class for FBISE &RBISE The detail topic by topic explanation of chapter 1 with PowerPoint slide notes for students of grade 9. CHAPTER – 1 Introduction to Biology Science: Our universe operates under certain principles. For understanding of these principles, the experiments are done and observations are made; on the basis of which logical conclusions are drawn. Such a study is called “Science”. In brief science is the knowledge based on experiments and observations. Biology: The Scientific study of living organisms is called Biology. The word biology is derived from two Greek words “bios” meaning life and “logos” meaning thought, discourse, reasoning or study. It means that all aspects of life and every type of living organism are discussed in biology. Branches of Biology: Biology is divided into following branches: Morphology: The study of form and structure of living organisms is called morphology. It can be further divided into following two part...