ABO Blood Groups

There are four types of blood groups in human beings: A, B, AB and O. These are based on types of proteins on the cell membrane of red blood cells. There are two types of proteins denoted by the letters…
Lesson Notes, Audio Lessons, Exam Questions
Lesson Notes, Audio Lessons, Exam Questions
Welcome to our collection of Biology lesson notes covering all topics for SS 1 to SS 3 students. These notes are aligned with the WAEC and NECO syllabus, providing a structured approach to mastering key concepts in Biology. From cell biology to ecology, you’ll find lessons on the essential topics you need to excel in your exams.
Our resources are designed to support both independent study and classroom learning, helping you build a strong foundation in Biology.
Whether you’re revising for your exams or seeking to understand complex concepts, these notes and topics will guide your learning every step of the way.
See our comprehensive Biology lesson notes and topics for SS 1 to SS 3 students. Perfect for WAEC and NECO preparation.

There are four types of blood groups in human beings: A, B, AB and O. These are based on types of proteins on the cell membrane of red blood cells. There are two types of proteins denoted by the letters…

Immune response is the production of antibodies in response to antigens. An antigen is any foreign material or organism that is introduced into the body and causes the production of antibodies. Antigens are protein in nature. An antibody is a…

Composition of Blood The mammalian blood is made up of fluid medium called plasma with substances dissolved in it. Cellular components suspended in plasma include; Plasma This is a pale yellow fluid consisting of 90% water. There are dissolved substances…

Transpiration is the process by which plants lose water in the form of water vapour into the atmosphere. Water is lost through stomata, cuticle and lenticels. Stomatal transpiration: This accounts for 80-90% of the total transpiration in plants. Stomata are…

Transport is the movement of substances within an organism. All living cells require oxygen and food for various metabolic processes. These substances must be transported to the cells. Metabolic processes in the cells produce excretory products which should be eliminated…

rgans that are involved with feeding in humans constitute the digestive system Digestive System and Associated Glands Human digestive system starts at the mouth and ends at the anus. This is the alimentary canal. Digestion takes place inside the lumen of…

What is Obesity? Obesity is a condition whereby one takes in excess calories than the body requires. The excess calories are converted into fat and stored under the skin and around vital internal organs. Obesity is caused by: Anorexia Nervosa…