humans cause

The ultimate cause of pollution is human activity itself. Pollution is a human contribution to nature. Science has evolved technologies and technologies have helped the human welfare. In the process, the pollution has been a part of technology and there..

The ultimate cause of pollution is human activity itself. Pollution is a human contribution to nature. Science has evolved technologies and technologies have helped the human welfare. In the process, the pollution has been a part of technology and therefore a..

A chemical or other environmental agent that produces cancer is called a carcinogen. The world Health organisation estimates that carcinogens may be associated with 60 - 90% of all human cance..

A chemical or other environmental agent that produces cancer is called a carcinogen. The world Health organisation estimates that carcinogens may be associated with 60 - 90% of all human cancer. Depending upon their mode of action carcinogens are of 3 types. (1) Carcinogens that caus..

The loudness of sound depends upon both intensity and frequency. For a given frequency, an increase in intensity produces an increase in loudness, but the sensitivity of the ear is so different in the various frequency ranges that equal intensities produce far different sensations in the different..

Accidents - Large area of forest catches wild fire accidentally. If not controlled in time by proper methods, fire grows out of proportion. In the last 5 years two major wild fires (in USA and Malaysia) are recorded. Each of them has sent an estimated 1.5 million tons of CO 2 to atmosphere. Over ye..

Living organisms are exposed to various external or foreign substances and disease causing organisms like bacteria, viruses and fungi. Such organisms which can cause a disease are known as Pathogens. It is observed that some human beings are more prone to a certa..

>Culturing of human cells invitro, help in understanding the biochemical basis of inheritance. Human cytology and karyotyping helps in ascertaining the number, shape size and structural features of chromosomes. Study of monogygotic twins helps in distinguishing between hereditar..

Introduction - Living organisms are exposed to various external or foreign substances and disease causing organisms like bacteria, viruses and fungi. Such organisms which can cause a disease are known as Pathogens . It is observed that some human beings are more prone ..

Summary - 1) The human body has elaborate mechanisms for protection against foreign bodies, germs and cancer cells. 2) Immunity is either innate or acquired. 3) Innate or non-specific immunity refers to a wide variety of body responses against a wide range of pathogens. 4) Previous exposu..