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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.
Blastula is the ball of cells surrounding a fluid-filled cavity (known as blastocoel) which is produced by the cleavage of a zygote.
Glucose-6-phosphate to Glucose Glucose-6-phosphate to Glucose : Glucose-6-phosphate is converted to glucose by glucose-6-phosphatase which is present in intestine, liver and
Techniques of Plant Tissue Culture A standard tissue culture laboratory should provide facilities for washing and storage of glass ware, preparation and storage of nutrient
WHAT IS MEGASPOROGENESIS?wHERE IT OCCUR?hOW IT OCCURS?
Q. Explain the factors on which Spoilage of fish depends? i) The type offish. Different types of fish are susceptible to spoilage due to shape and size. A fat fish is suscept
Photoperiodism was first characterised in : 1. Tobacco 2. Potato 3. Tomato 4. Cotton Tobacco is the first in whic photoperiodism characterised.
Water Loss - Plant Water Relation Plants lose about 98% of water to the atmosphere by transpiration. Often water loss by transpiration exceeds gain by absorption and results
Q. Why is the concept of a single gene as ultimateunit of inheritance inadequate to provide a unitary explanation for protein synthesis, recombination and mutation? Answer:
heterotrophic mode nutrition plants
Transport in Phloem The basic necessities of plants, water, are taken up by the roots. Another purpose served by the roots is to absorb water soluble mineral nutrients from th
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