Class 12 Biology Ecology Kingdom - Monera And Viruses
Organisms which obtain energy by the oxidation of reduced inorganic compounds are called:
(a)
homoautotrophs
(b)
chemoautotrophs
(c)
saprozoic
(d)
coproheterotrophs
Correct answer: (b) 
Solution: The organisms obtaining energy by chemical reactions independent of light are called chemotrophs. The reductants obtained from the environment may be inorganic (in case of chemoautotrophs) or organic (in case of chemoheterotrophs). Photoautotrophs organisms that make their own food by photosynthesis, using the light energy. Saprozoic organisms obtain food from dead and decaying matter.

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ecosystem
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