What is Pollution ? Pollution is an undesirable change in the physical, chemical and biological characteristics of environment. It is harmful to human life and other organisms. Agents causing pollution are known as pollutants. Or It is the addition of unwanted constituents to air, water or land, which deteriorates the natural quality of the environment. … Read more
Human Population may be defined as a group of organisms belonging to one species which occupy a given area. It has characteristics which are a function of the whole group and not of the individuals. These are population density, birth rate, death rate, age distribution, biotic potential, rate of dispersion and growth form. … Read more
We are going to discuss about the two types of Nervous System, as well as the Function of Nervous System, Unit of Nervous System & Structure of Nervous System. If you have any doubt related to Nervous System, then it is going to be clear in this article because we are going to cover mostly topics related … Read more
As a result of the complex chemical reactions taking place within the body, certain metabolic waste products are formed. For example : large amounts of CO2 and water are produced from metabolism of carbohydrates, fats and proteins. We are going to discuss about Excretory System, products from Excretory System & structure of kidney. Ammonia, urea … Read more
Human heart is a reddish brown, pulsatile, pumping centre. It pumps and collects blood to and from the various body parts. It is of the size of a human closed fist. It weighs about 300 g. It is a broad conical structure. Upper side of human heart is broad called base and the lower pointed … Read more
Formed (cellular) elements Formed (cellular) elements (RBCs, WBCs and Platelets) are shaped structures visible under the microscope as cells and cell-like structures present in the blood. They form 42 – 45% of blood. These are of three types i.e., Red Blood Cells (RBCs) or Erythrocytes. White Blood Cells (WBCs) or Leucocytes. Blood platelets or Thrombocytes. … Read more
Filling the petrol tank of a motor car is of no use, unless there is a pipeline to carry the petrol from the tank to the engine. Similarly, digesting food in alimentary canal and absorbing O2 from external environment in respiratory organs shall be of no use to an animal unless the digested nutrients and … Read more
Normally, plants are fixed in the soil and do not move here and there. However movement is seen in certain cases. We are going to read about Tropic Movements in Plants. Chlamydomonas and Volvox show movement by means of flagella. Mosses and ferns are ciliated and move about in water. Plants show movement in response … Read more
Growth is one of the most fundamental characteristics of all living organisms. We are going to discuss about Plant Hormones : Auxins, Gibberellins, Cytokinins, Ethylene and Abscisic Acid. It is the net result of various processes that together cause an irreversible permanent increase in the size of an organism or its parts. In plants, growth take … Read more
If you are searching that, ” What are the different types of transpiration ?”. Then you are at the correct article because we are going to discuss about definition, types, process and factors of transpiration. Plants absorb large quantities of water as well as mineral salts from the soil with the help of their roots. … Read more