What is the nature of the offspring produced by organisms included in Protista and Monera?

Which one single organism or the pair of organisms is correctly assigned to its taxonomic group?

What type of sexual reproduction can be observed in the organism shown in the given figure?

Which of the following domains lacks a cell wall?

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:

Which of the following is not a prokaryote?