The undesirable change in physical, chemical or biological characteristics of air, land and water is referred as

Related MCQs

• A high Biological Oxygen Demand (BOD) indicates that:
• High biological oxygen demand indicates:
• Upper layer of water in a single body of water is known as
• Which of the following statements regarding species interdependence are true? A) An association of two species where one is benefitted and other remains unaffected called mutualism B) An interspecific association where both partners derive benefit from each other is called commensalism C) A direct food relation between two species of animals in which one animals kills and feed on another is referred as predation D) A relationship between two species of organism where both the partners are benefitted from each other is called symbiosis.
• The formation of a climax community from an abandoned farm land is a an example of
• All are physical pollutants except
• Air pollution is severe in
• Fine organic or inorganic particles suspended in air is called
• Air pollution can be of
• Many freshwater animals cannot live for long in sea water and vice versa mainly because of the