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Pollution - Environmental Pollution
Pollution refers to any undesirable change in the physical, chemical or biological characteristics of our environment, i.e. air, water and oil that may or will adversely affect humans or other species and life support systems of our biosphere directly or indirectly. A substance whose introduction into a resource damages the latter's usefulness is called a pollutant. Pollutants are grouped into two broad categories:
The non-biodegradable pollutants such as heavy metals, pesticides, move through the food chain and may get magnified to dangerous levels in higher trophic level organisms. Some of these combine with other compounds and produce toxic substances. However, biodegradable materials such as human and animal wastes, agro-based residues and fertilisers can also pose a threat if their quantities or inputs exceed the Assimilative capacity of the environment.
Mechanisms of different species of animal In an animal when the need to change the focal power of the eye arises, different mechanisms are there in different species of animal
S p e c i a l Uses Biogas Biogas is an important renewable energy resource for rural areas. Generation of bio-gas from dung and urine is a very simple and cost-effective
ADRENAL OR SUPRARENAL GLANDS (GLANDS OF EMERGENCY) - These are paired structures located on the top of the kidneys. Each adrenal gland has two parts external adrenal cort
Q. Explain Right and left Dominant Circulation? Right Dominant Circulation: In 85 per cent of patients, the right coronary artery goes on to form the AV nodal artery, the poste
abnormal lung volumes and capacities
Explain the Meaning of anthropometric measures Anthropometric Measures mean and its uses. The term Anthropometric refers comparative measurement relating to the body structure.
Aim of Diabetes Counselling Diabetes is a life-long illness. Diagnosis of diabetes has psychological and physical implications. Preventive counselling and life style change ca
Thermodynamics Thermodynamics tells us that every transformation of matter chemical transformation is accompanied with energy conversion .For example when complex molecul
Diversity is defined as the no of species present in a community termed as "species richness". We can represent species biodiversity at different geographical scales as alpha, beta
Q. From the intestinal lumen through to the tissues - what is the route of nutrients after digestion? Monosaccharides, mineral salts, amino acids and water are absorbed by the
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