Class 10th ICSE

Heredity and Evolution - Evolutionary Relationships II * Homologous and analogous characteristics help identify an evolutionary relationship between different species. * Fossils are an important evidence of evolution. * Evolution of eye in different species is an example of biological convergence. * Reptiles and birds have evolved from a common ancestor through adaptation. * Different ... Read more

Population Change * Population change refers to the change in the number of people due to birth, death or migration during a specific period of time. * The rapid growth in population is referred to as population explosion. * Birth rate is the number of live babies born in a year for every 1000 people ... Read more

How Do Organisms Reproduce? - Reproduction in Unicellular and Multi-cellular Organisms * Organisms like Hydra reproduce by building. They use the regenerative cells for reproduction in the process of budding. A bud develops as an outgrowth due to repeated cell division at a specific site on the hydra. Each of these buds develops into a ... Read more

Human Endocrine System * Endocrinology is a branch of medicine dealing with the study of the endocrine glands and the actions of their hormones. * The hypothalamus, pituitary, thyroid, parathyroid, thymus, pancreas, adrenal and gonads are the endocrine glands on our body. * Endocrine glands are also called ductless glands due to the absence of ... Read more

Neural System * Coordination between organ systems and the functions of the organs is crucial to maintain a physiological balance, called homeostasis. * The neutral system and the endocrine system maintain homeostasis in our body. * Neurons are called the structural and functional units of the neural system. * The human neural system is divided ... Read more

Human Excretory system * The human excretory system consists of a pair of kidneys, a pair of kidneys, a pair of ureters, a urinary bladder and the urethra. * The kidneys are compact, bean- shaped organs on either side of the spinal cord in the lower back. * Nephrons are the functional units of a ... Read more

Life Processes * The circulatory system consists of the heart and blood vessels. * Plasma contains suspended red blood cells, white blood cells and Platelets. * Red blood cells contain a pigment called haemoglobin. * In newborn babies, 17 to 22 gm/dl of haemoglobin should be present in the blood. For children, the normal range ... Read more

Control and Coordination - Coordination in Plants * Plants show two different types of movement- One independent of growth and the other dependent on growth. * Plants growth in the direction of stimulus is defined as tropic movement. * The movement of a plant part is response to light is called phototropism. * The movement ... Read more