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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.
Metamorphosis The phenomenon of metamorphosis is described as a process during development which involves a remarkable change in morphology and physiology of the larva, so tha
Q. How is the respiratory system of beings of the phylum Annelida characterized? Respiration in annelids can be branchial or cutaneous. Cutaneous respiration takes place due to
Describe three ways that RNA differs from DNA. RNA is single stranded; DNA is double stranded all of the codons from the deletion point to the end of the transcript would be s
Describe about Acyanotic Congenital Heart Disease ? The following lesions will be discussed here: Left to right shunts: Atrial Septal Defect (ASD), Ventricular Septal Defect
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Zinc deficiency Zinc is essential for several physiological functions in the body such as protein synthesis, carbohydrate and nucleic acid metabolism, and foetal growth. The de
What is the main theory opposed to evolution? The major theory that opposes the evolution theory on the explanation of how species emerged (phylogenesis) is fixism.
Vertebrate Eye - Adult Eye There are no main differences in the structure or composition of the eyes among different vertebrates. This should be clear to you from the diagram
D-glucose differs from D-galactose only in the arrangement around carbon 4. Therefore D-glucose and D-galactose are- Select one: a. enantiomers b. epimers c. mirror ima
How dissimilar are intracellular and extracellular digestion? What is the evolutionary benefit of extracellular digestion? Intracellular digestion is that in which the breaking
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