Q. No.Which organisms are responsible for the production of biogas?
(1) Archaebacteria
(2) Eubactetia
(3) Mycoplasma
(4) Protists
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The characteristic feature of eubacteria is -
(1) Rigid cell wall
(2) Flagellum in motile ones
(3) Chlorophyll a
(4) all of these
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Cyanobacteria do not possess which feature?
(1) Unicellular
(2) Colonial or filamentous
(3) Form blooms in polluted water bodies
(4) Only marine algae
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The specialised cells to fix atmospheric nitrogen is called as
(1) Heterocyst
(2) Heterocyte
(3) Heterocoem
(4) Heterolog
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Find the incorrect match.
(1) Heterocyst-Archaebacteria
(2) Gelatinous sheath- BGA
(3) Methanogen- Biogas
(4) Chlorella- protista
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Which of the following is correct with respect to heterocyst
(1) Nostoc, Anabena
(2) Only Anabena
(3) Nostoc
(4) All eubactetia
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Chemosynthetic autotrophic bacteria does not help in recycling of
(1) Nitrogen
(2) Iron
(3) Sulphur
(4) Mangnese
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Chemosynthetic bacteria does not use which inorganic substrate?
(1) Nitrites
(2) Nitrates
(3) Chlorides
(4) Both a and b
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Chemosynthetic autotrophs derive energy by
(1) By sunlight
(2) By oxidation of inorganic substances
(3) By reduction of inorganic substances
(4) By reduction followed by oxidation of inorganic substances
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The majority of heterotrophic bacteria are
(1) Decomposers
(2) Autotrophs
(3) Lithotrophs
(4) Organotrophs
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