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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.
Q. What is inharmonious ecological interaction? The negative or Inharmonious ecological interaction is that in which at least one of the participating beings is harmed. Q.
What are the principal sources of excessive nitrate and phosphate in rivers and lakes?
Explain about the Vitamin D? Vitamin D is a generic term and indicates a molecule of the general structure with rings (A, B, C, D), as you may have noticed in Figure B. The ri
Q. Pathophysiology of mitral stenosis? Normally there is no pressure gradient between left atrium and the left ventricle during diastole. However, as the valve orifice size dec
IMPLAN TA TIO N - Attachement of blastocyst on the endometrium of the uterus is called implantation. Generally it occurs 7th day after fertilisation. (6-10 days). Blas
Nutrition As we have said earlier all animals are heterotrophs and require food from the environment. What is this food made up of? If the food of a number of different animal
Floristic Composition - Qualitative Characters One of the important qualitative characteristics of a community is its floristic composition. This broadly refers to the kind o
Importance of Behaviour Change Communication BCC is an in built part of a diabetes prevention, care and support program. Importance of BCC: · Increase knowledge. BCC can en
In which meiotic division does the separation of identical chromatids occur? After the end of this process what are the ploidies of the new cells? The separation of identical c
Explain the Storage of Vitamin E? Vitamin E is mainly stored in muscles and adipose tissue. Vitamin E content of erythrocytes is about 20 percent of that in plasma and there i
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