question_answer

Select the correct statements among the following (i-iv) regarding the characteristics of certain organisms.

(i) Methanogens are archaebactria which produce methane in marshy areas.

(ii) Nostoc is a filamentous blue ?green alga which fixes atmospheric nitrogen.

(iii) Mycoplasma lack a cell wall and can survive without oxgen

 

A)  (ii) and (iii)         

B)           (i) and (ii)

C)  (ii), (iii) and (iv)   

D)           (i), (ii) and (iv)