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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.
Thiazide diuretics have been accepted as the primary foundation of antihypertensive therapy. The basis of this choice is that, apart from their primary hypotensive effect, they enh
SOM E COMMON REFLEXES RELATED TO RESPIRATION - 1. Cough Reflex: Due to stimulation in Trachea before it 2.5 lit. air is inhaled. 2. Sneezing Reflex: Stimulati
Advances in neurodiagnostic techniques Major scientific and technology advances have made it easier to correlate behaviours suspected as having a neurological basis with actual
Which statement is correct? A. Synapomorphies identify monophyletic groups. B. A synapomorphy may arise due to covergent evolution. C. A synapomorphy is an ancestral trait. D. Syna
Conduction in Myelinated Axons The myelin sheath provides insulation for the axon preventing movements of Na + and K + through the membrane. Therefore, if this myelin sheath
Chemical disasters arise from harmful and potentially hazardous chemicals, which if released of misused can pose a threat to the environmental. Its range depends upon military and
THEORIES TO EXPLAIN FINE STRUCTURE OF CHROMOSOME (1 ) Multistranded theory Steffenson 1959 - each chromosome composed of two chromatids (Half Chromosome) and each chromat
What is natural selection? Natural selection is the method by which organisms that have certain favorable traits are better capable to survive and make successfully than organi
Angiosperms are the flowering plants. They first appeared at least 110 million years ago from the unknown gymnosperm ancestor, these flowering plants have risen to dominance in th
Infection Due to the many invasive monitoring techniques, ET tube, urinary catheter, surgical interventions. Cultures of blood or sputum/urine/swab form the wound is don
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