How many organisms in the list given below are autotrophs?
Lactobacillus,Nostoc,Chara,Nitrosomonas,Nitrobacter,Streptomyces,Saccharomyces,Trypanosoma,Porphyra,Wolffia

Select the correct combination of the statements $(i-iv)$ regarding the characteristics of certain organisms.
$(i)$ Methanogens are archaebacteria which produce methane in marshy areas.
$(ii)$ Nostoc is a filamentous blue-green alga which fixes atmospheric nitrogen.
$(iii)$ Chemosynthetic autotrophic bacteria synthesize cellulose from glucose.
$(iv)$ Mycoplasma lack a cell wall and can survive without oxygen.
The correct statements are:

Bacteria and yeast are similar in all the following features except that

Select the non-protistan group.

Fungi differ from bacteria in:

The sexual system of classification is: