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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.
Phylum Phytofagellata (Plant flagellates) 1) At some stage of life cycle they have one or more flagella. The flagella are used for locomotion. 2) Photosynthetic protistan
Binary Fission - Types of Asexual Reproduction Binary fission is a procedure in which an organism divides mitotically into two equal individuals which are generally identical
Define Barrier layer cells (photocells) They are the very simple of the detectors. It contains the bottom support layer of conductive metal like iron. A photosensitive layer of
Explain the effect of Deficiency of pyridoxine? A deficiency of vitamin B6 alone is uncommon because it usually occurs in association with a deficit in other B-complex vitamin
Stethoscope Stethoscope is used for listening to the internal sounds of a body. Stethoscopes vary in their design and material. Most are made of Y-shaped rubber tubing. This sh
Types of gastrulation
Define Regulation of amino acid levels in the blood? Regulation of amino acid levels in the blood: Vitamin D helps to prevent loss of amino acids through the kidney and thus
The vast amount of genomic DNA in a eukaryotic cell is strongly packaged in chromosomes having within a specialized organelle and the nucleus. This very vast amount of e
Q Are there non-parasitic viruses? All viruses are necessitating intracellular parasites that are they depend on the host cell to complete their life cycle. A virus does not ha
A Molecule of DNA is 2.17 um long. The ends of the molecule become strongly ionixed: negative on one end, positive on the other. The helical molecule acts like a spring and compres
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