1. Preventing Normal Metabolic Activity: For controlling the harmful action of bio-cells like microorganisms they are prevented of normal harmful metabolic activity by treating with agents. The actions of these agents have been defined giving different terminologies. a. Germicidal: Any agent that destroys disease organisms, but modern definition is any agent that destroys microbes but not spores, irrespective of whether [...]
Relationship between organisms and their environment are based on certain principles which are summarized as follows: 1. Everything influencing the life processes of an organism constitutes its environment. 2. Environment in a habitat may be considered into biotic and abiotic components and the activities of the organisms are influenced by the combined effects of various environmental factors. 3. An organism [...]
Classification determines methods for organizing the diversity of life on Earth. Since life first appeared on Earth 3.5 billion years ago, many new types of organisms have evolved. Many of these organisms have become extinct, while some have developed into the present flora and fauna of the world. It is believed that the extinct species may outnumber the living ones [...]