Name any two groups of micro-organisms from which antibiotics could be extracted.
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In which of the following groups of organisms, food material is broken down outside the body and absorbed?
(b) Yeast, mushroom, bread mould
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Organisms of a higher trophic level which feed on several types of organisms belonging to a lower trophic level constitute the
(a) food web
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Which organisms are called primitive and how are they different from the so-called advanced organisms?
An organism which is simple is called primitive. On the other hand, an organism with high level of division of labour, by formation of organs and organ system is called...
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Which groups of French society benefited from the revolution? Which groups were forced to relinquish power?
Peasants and artisans of French society benefited from the revolution. Clergy, nobles and church had to relinquish power. It is obvious that those who had to forego power and privileges...
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What are antibiotics? What precautions must be taken while taking antibiotics?
Antibiotics are medicines produced by certain micro-organisms to kill other disease-causing microorganisms. Precautions to be taken while using antibiotics are: - Antibiotics should be taken under the supervision of a well...
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Many proteins are secreted in their inactive form. This is also true of many toxic proteins produced by micro organisms.
Many proteins including certain toxins are secreted in their inactive form. They get activated, only when exposed to a specific trigger (pH. temperature etc.). It is advantageous to the bacteria...
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Name any two organisms which occupy more than one trophic level in an ecosystem
Man and sparrow etc.
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Micro-organisms act upon the dead plants to produce
(iii) humus, Answer is correct
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(i) No rainbow could be observed from the surface of moon by the astronauts. What could be the possible reason ?
(i) The rainbow is formed only if the atmosphere contain large number of tiny droplets of water suspended in the air. As moon has neither atmosphere nor water therefore no...
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The process of mineralisation by micro organisms helps in the release of: a. inorganic nutrients from humus
a. inorganic nutrients from humus
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