Biology

This chapter describes various life processes needed by a living organism for obtaining energy and to survive. These processes include nutrition, respiration, transportation and excretion.

This chapter describes control and coordination in animals and plants. In animals, it is done by the nervous (the brain and the spinal cord) and the endocrine system (hormones). In plants, it is done by phytohormones, i.e., plant hormones.

This chapter defines the process of reproduction in unicellular and multicellular organisms. Mode of reproduction can be asexual or sexual. Reproduction helps to transmit genetic information from one generation to another.

In this chapter, we will learn about evolution, which are the slow and gradual changes taking place within a species over time. It describes the inheritance of those changes from one generation to the next generation.

This chapter discusses the effect of human activities on the environment. It also defines the food chain and food web. The physical and biological conditions interact to establish a stable ecosystem that comprises both biotic and abiotic components.

This chapter describes the importance and usage of natural resources. The concept of five R’s is defined to save environment and resources. For the availability of natural resources for future generations, we need to manage and protect all resources.