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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.
XYY humans are fertile males. XXX humans are fertile females. What do these observations reveal about the mechanisms of sex determination and dosage compensation?
Q. What is Phenylketonuria? The essential amino acid phenylketonuria is utilized for tissue protein synthesis and hydroxylated to form tyrosine. The hydroxylation reaction requ
What are synthetic auxins and what are their uses? Synthetic auxins, like indolebutyric acid (IBA) and naphthalenic acid (NAA) are substances same to IAA (a natural auxin) but
GONADS - They develop from the mesoderm of the embryo. The gonads are the sex glands; the ovaries and the testes. They produce ova and sperms respectively i.e. cytogenic in
Define Historical Example Population genetic theory? Population genetic theory, first developed by Sir Ronald Fisher, JBS Haldane and Sewall Wright, demonstrated how several ev
M e rc u r y The metal is biologically non-essential but being used in various industries, it is released in environment from both natural and anthropogenic sources. Man-m
On a given microscope, the numerical aperture of the objective is 1.5. The microscope is provided with a filter that selects a wavelength of 500 nm. What is the limit of resolution
REASON'S FOR MENDEL'S SUCCESS 1. Mendel selected only pure breeding varieties of pea ( Pisum sativum ) for his experiments. 2. Mendel took only those traits
Minerals :- Phosphates Food Source Ubiquitous, animal products tend to be good sources Nutritional Functional role Essential nutrient: Deficiency is rare due
Photosynthesis Photosynthesis - the process by which plants utilise energy from sunlight to convert carbon dioxide and water for the synthesis of sugar. This sugar can then be
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