The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals include the:

Which, among the following, are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?

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

Select the wrong statement:

Given below is the diagram of a bacteriophage. In which one of the options, all the four parts A, B, C and D are correct?

Chrysophytes, euglenoids, dinoflagellates and slime moulds are included in the kingdom:

Which of the following statements is wrong for viroids?

Cell wall is absent in:

Which one of the following sets of items are correctly categorised with one exception in it? | | Items | Category | Exception | | :--- | :--- | :--- | :--- | | (a) | Kangaroo, Koala, Wombat | Australian Marsupials | Wombat | | (b) | Plasmodium, Cuscuta, Trypanosoma | Protozoan parasites | Cuscuta | | (c) | Typhoid, Pneumonia, Diphtheria | Bacterial diseases | Diphtheria | | (d) | UAA, UAG, UGA | Stop codons | UAG |