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There are two main sources of pollution:
(1). Natural Sources:
(a) Volcanic ash
(b) Marsh gas (CH4) released from decay of organic matter.
(c) Dust from dust storm.
(d) Pollengrains, spors, bacteria, cysts etc.
(2). Anthropogenic sources:
Man has aggravated the problem of pollution by his innumerable activities like.
(a) Industrialization
(b) Revolution in automobile industry
(c) Deforestation
(d) Nuclear explosion
(e) Over exploitation of natural resources.
Two chromosomes in a cell have identical length and centromere position yet are not homologous, what is different about them.
1. What are the examples of helobial endosperm
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Define drawbacks for underwater weighing method? Since the major drawbacks with UWW method are that the subject needs to be totally submerged underwater and exhale all of the a
Q. How does digestion in beings of the phylum Annelida work and which type of digestive system do they have? Digestion in beings of the phylum Annelida is extracellular. These
MECHANIS M - Tergo-sternal muscles are relaxed. Volume of cavity is increased and pressure is decreased. To full fill the pressure air comes through the passage & mixed
Explain the Behavioural Observations of the child Behavioural observations of the child are the second critical source of information available to the neuropsychologist. Qualit
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what is the phylum protozoa and when he was discover
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