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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.
hydra has what symmetry......radial or biradial????
Tissue culture The ability of a plant cell to give rise to a whole plant is called totipotency. The culture of a cell or a tissue in a suitable medium to produce new plan
What is tubal pregnancy? Many times fecundation takes place in the Fallopian tubes. Usually the newly formed zygote is taken to the uterus where nidation and the embryonic deve
Diagnosis of galactosemia is by measuring the activity of gal-l-P-transferuse in erythrocytes. Galactose should be restricted if the gal-1 -P-transferase is elevated above 2 mg/dl.
Q. What is the nitrogen waste in amphibian larvae and in the adult animal? The terrestrial adult excretes urea since amphibian larvae are aquatic they excrete ammonia.
KINDS OF GROWTH - 1 . AUXETIC GROWTH - Body grows by enlargement of its cells without increase in number of cells. eg. Nematodes, rotifers, tunicates. Growth of b
Osmoregulation in Terrestrial Environment Earlier you have learnt about osmoregulation in aquatic environment. In this section, we shall study how the terrestrial animals cop
Illustrate the Applications of vitamin B 6 The heating processes employed in the industry for the sterilization of milk based formulations will greatly reduce their vitamin B
Define Advantage & disadvantage of using fungi as source of protein? Advantages 1. Easy to harvest from culture medium. 2. Texture of the fungi improves the functional
Q. How in the respiratory chain do electrons from NADH2 and FADH2 passing through cytochromes liberate energy for the ATP synthesis? What is this ATP synthesis called? NADH2and
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