Select the correct combination of the statement (a-d) regarding the characteristics of certain organisms :
(i) Methanogens are Archaebacteria which produce methane in marshy areas
(ii) Nostoc is filamentous blue-green alga which fixes atmospheric nitrogen
(iii) Chemoysynthetic autotrophic bacteria synthesize cellulose from glucose
(iv) Mycoplasma lack a cell wall and can survive without oxygen
The correct statements are:
Text Solution
Verified by ExpertsC
(i) Methanogens are Archaebacteria...: Correct. Methanogens are a specialized group of Archaebacteria found in anaerobic environments like marshy areas and the gut of ruminants, where they produce methane gas.
(ii) Nostoc is filamentous blue-green alga...: Correct. Nostoc is a type of cyanobacteria (blue-green algae) that forms long filaments and contains specialized cells called heterocysts for fixing atmospheric nitrogen.
(iv) Mycoplasma lack a cell wall...: Correct. Mycoplasma are the smallest known living cells and are unique because they completely lack a cell wall, allowing them to be pleomorphic (change shape). They are also capable of surviving without oxygen (facultative anaerobes).
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