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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.
Membrane is any delicate sheet that divides one region from other blocking or permitting (selectively or completely) the passage of substances. The skin, for example, can be consid
Explain the Membrane Equilibria? A semipermeable membrane used to separate two liquid phases can, in principle, be permeable to certain species and impermeable to others. A mem
PERSONNEL It is important that while allocating nursing, medical and paramedical staffs, the needs of the neonatal unit should not be ignored. The highest priority in the orga
Q. What do you mean by QRS Changes? The total amplitude of the QRS compared with exercise usually decreases near peak workload, as well as the T-wave amplitude, and there is a
The axons of all the baroreceptors in the body were destroyed at 2 AM. All else is normal. Which of the following statements is true for the system at 2:10 AM when compared to th
Into which classes are mollusc divided? What are some representing beings of each class? The phylum Mollusca is separated into five major classes: pelecypods, or bivalves (Pele
Define Procedure for Measurement of pH? To ensure reliability of the pH readings, you should first calibrate the pH meter. You should adjust the pH meter so that the readings a
R a d i o g raphic imaging: Radiology has been in use since the discovery of X-rays by Wilhelm Conrad Roentgen in 1895. Until 1980s, radiography was the
What is cellular regeneration? How is mitosis related to this process? Some tissues are able to regenerate when injured. The liver, for instance, regenerates when small pieces
Explain the barrier function in the cornea. Barrier Function: It is the first line of barrier between the external environment and the corneal stroma. The superficial epi
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