In the five kingdom system of classification, which kingdom includes blue-green algae, nitrogen-fixing bacteria and methanogenic archaebacteria ? What is the criteria of including these diverse organisms in single kingdom ?

Select the correct combination of the statement of the statement (A-D) regarding the characteristics of certain organisms (A) Methanogens are Archaebacteria which produce methane in marshy areas (B) Nostoc is a filamentous blue-green algae which fixes atmospheric nitrogen (C) Chemosynthetic autotrophic bacteria synthesize cellulose from glucose (D) Mycoplasma lack a cell and cen survive without oxygen The correct statement are

In most animals the metabolic reactions proceed in a……A……..temperature range (in humans, it is 37^@C ). But there are microbes (archaebacteria) that flourish in hot spring and deep sea hydrother mal vents where temperature farexceed ………B……… Choose the correct options for A and B

Of the following statements which are not relevant to archaebacteria They live in some of the most horsh habitats ,They are present in the gut of several ruminant animals they are characterised by the presence of a rigid cell wall , They include mycoplasma They are also referred to as blue- green algae.

Read the following statements and select the correct option Statement1: Almost all bacteria possess lipoproteinaceous plasma membrane. Statement2: The plasma membrane of archaebacteria as well as eubacteria have same type of lipids.

Identify true statements about archaebacteria. A. They can live in harsh habitats. B. Cell walls do not contain peptidoglycan. C. Cell membrane contains branched chain D. Some of them are capable of producing biogas.

Of the following statements which are not relevant to archaebacteria? A. They live in some of the most harsh habitats B. They are present in the gut of several ruminant animals C. They are characterised by the presence of a rigid cellulosic cell wall D. They include mycoplasma E. They are also referred to as blue-green algae.