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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.
STRUCTUR E OF SPERMATOZOAN Structure of sperm is divided into 3 parts - (1) Head (2) Middle piece (3) Tail 1 . HEAD
Chromosomes are the condensed, fibrillar, self- replicating genetic structures of cells containing the cellular DNA which bears in its nucleotide sequence the linear array of gene
Q. Measurement and Evaluation of Food Texture? Kinesthetic characteristics deal with the sense of feel, just like the characteristics of appearance deal with the sense of sight
Q. PH of food in pectic ulcer? PH of food: It has. a little therapeutic importance except for patients with lesions in the mouth or oesophagus. Most foods are considerably les
Embryology This is the study of growth, fertilization, division or differential of the zygote into embryo of early development of living beings before the attainment of structure
Indication : IABP is commonly used to supporting failing left ventricle after open-I1ca1-t surgery or in cardiogenic shock after myocardial infarction. It is at times used in uns
Determine the Fluids and Electrolyte Requirement at high Altitude? In addition to cold induced diuresis, hyperventilation together with a dry environment at HA makes an individ
How are amino acids brought to the cellular site where translation takes place? What is an anticodon? Amino acids are brought to ribosomes by RNA molecules called as transfer R
compare gastrulation of amphibians and fish
What is (a) the male gamete, and (b) the female gamete in a flowering plant? (a) The male gamete in a flowering plant is the pollen grain (strictly, the gamete is the male
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