Whittaker (1969) divided organisms into five kingdoms: Monera, Protista, Plantae, Fungi and Animalia. Kingdom Monera includes all prokaryotes – Mycoplasma, bacteria, actinomycetes, blue-green algae, archaebacteria, methanogens. Escherichia is bacteria, Amoeba, Gelidium come under Protista, Spirogyra is algae.

Correct Option: B

Whittaker (1969) divided organisms into five kingdoms: Monera, Protista, Plantae, Fungi and Animalia. Kingdom Monera includes all prokaryotes – Mycoplasma, bacteria, actinomycetes, blue-green algae, archaebacteria, methanogens. Escherichia is bacteria, Amoeba, Gelidium come under Protista, Spirogyra is algae.

Chemosynthetic bacteria do not require sunlight as a source of energy either directly or indirectly. The energy for the synthesis of food is obtained by the oxidation of certain inorganic substances present in the medium.
The chemical energy obtained from oxidation reaction is trapped in ATP molecules. The ATP is used in CO₂ assimilation.

Correct Option: A

Chemosynthetic bacteria do not require sunlight as a source of energy either directly or indirectly. The energy for the synthesis of food is obtained by the oxidation of certain inorganic substances present in the medium.
The chemical energy obtained from oxidation reaction is trapped in ATP molecules. The ATP is used in CO₂ assimilation.

In bacteria asexual reproduction through binary fission is the most common method of multiplication. Sexual reproduction which comprises of syngamy and meiosis is entirely absent. Hence, no gamete formation takes place. In sexually reproducing organism alternation of generation occurs.

Correct Option: A

In bacteria asexual reproduction through binary fission is the most common method of multiplication. Sexual reproduction which comprises of syngamy and meiosis is entirely absent. Hence, no gamete formation takes place. In sexually reproducing organism alternation of generation occurs.

The bacterial genome/nucleoid is made of single circular double stranded DNA without histone protein as it is a prokaryotic organisms. The genome contains some 100 chemical sites or loci. Each locus contains in E. coli contains about 4000 genes.

Correct Option: C

The bacterial genome/nucleoid is made of single circular double stranded DNA without histone protein as it is a prokaryotic organisms. The genome contains some 100 chemical sites or loci. Each locus contains in E. coli contains about 4000 genes.

Escherichia coli, lives as a symbiont in human intestine.

Correct Option: A

Escherichia coli, lives as a symbiont in human intestine.