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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.
For each of the following stages, state the number of nuclear DNA molecules in one of your cells (i.e., 23,46, or...) and its ploidy (i.e.,n, 2n, or...). 1.) Prophase of mitosis
Q. How Implant design and surface affect osseointegration? Implant design Most conductive design for osseointegration is root form. They can be threaded, hydroxyapatite co
What are cotyledons? Cotyledons or else seed leaves are structures formed by the embryo of angiosperms to absorb nutrients from the endosperm and to store and transfer these nu
Q. Why are lysosomes known as "the cleaners" of the cell waste? Lysosomes carry out heterophagic and autophagic digestion autophagic digestion by digesting residual substances
The signals for parturition originate from: 1. placenta only 2. placenta as well as fully developed foetus 3. oxytocin released from maternal pituitary 4. fully develop
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METABOLISM - Word given by Shwann . It includes bio-chemical reactions occur in body may be constructive or destructive. It includes - Anabo
Blotting is the technique for detecting one RNA within the mixture of RNAs (a Northern blot) or one type of the DNA within of a mixture of DNAs (a Southern blot). A blot can prove
Q. What are the structures that participate in the human auditory sensitivity? The structures of the human auditory sensitivity are the ears (middle and internal, external) the
What do you understand by Exoskeleton. Supporting structures of skeleton not surrounded by the body. Endoskeletal elements are secreted by an underlying epidermis and one side
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