top 10 biology

This consists of a variety of farm wastes such as farm weeds, straw, sugarcane refuse, rotting vegetables, kitchen wastes, crop stubble, groundnut and rice husk. Composting is a biological process in which aerobic and anaerobic microorganisms decompose organic matter. A trench of suitabl..

Pyramid of Energy - "Pyramid of energy is a graphic representation of the amount of energy trapped per unit time and area in different trophic level of a food chain with producers forming the base and the top carnivores at the tip". Pyramid of Energy in a Food Cha..

From the seminiferous tubules, the sperms are passed into a network of 10-12 ducts called the efferent ducts or the vasa efferentia . They are then passed into a highly coiled tubular part called the epididymis . Epididymis is an organ that extends from the top of the testis ..

Molars are also flattened on top. However, the number of cusps are more ranging from three to five. They are bigger teeth and appear only in the permanent set of teeth. In fact, the last molar in each side, appears only much later in the adulthood. Hence, they are commonly called the wis..

Ten Percent Law - Lindemann (1942) put forth ten percent law for the transfer of energy from one trophic level to the next. According to the law, during the transfer of organic food from one trophic level to the next, only about ten percent of the organic matter is sto..

- This is a representative list of topics covered in our Grade 10 Biology program - however all programs will be customized for the individual studen..

Due to bioaccumulative characters, these pollutants pass through the food chain and food web. While passing through the organisms, the concentration of pollutants gets increased. This is called bio magnifications. For e.g., 0.5 ppm DDT in grasses gets magnified to 2ppm in sheep. It may b..

Certain harmful substances, usually ones not found in nature but introduced by man, may get into plants and/or animals. These poisonous substances may not be broken down in the body or excreted easily, efficiently and quickly. Instead, they accumulate in the tissues, and as the living organism eats..

1. Bio weapons are very cheap. 2. They kill large number of people. Example: 10 gms of anthrax can kill 1.3 million people. 3. They are invisible, odorless, tasteless when released. A popular example of such bio-war is Anthrax. It was recently used by followers of Osa..

The process is the transformation of gaseous nitrogen into nitrates by living organisms. Biological nitrogen fixation occurs by: a) Symbiotic nitrogen fixation, which is brought about by certain bacteria such as: i) Rhizobium species in the root nodules of legumes (pea family) ii) Nostoc..