Mycoplasma is the only known bacteria genus lacking cell wall are……….
a) spirochetes
b) all gram-negative bacteria
c) chlamydias
d) gram-positive bacteria
Which of the following were the oxygen producing bacteria?
a) cyanobacteria
b) all proteobacteria
c) chlamydias
d) spirochetes
Explanation: Cyanobacteria, formerly known as blue-green algae, are photosynthetic microscopic organisms that are technically bacteria.
Which of the following play important role in the evolution of life as their photosynthetic activity?
a) cyanobacteria
b) all proteobacteria
c) chlamydias
d) spirochetes
Nostoc is the member of ……….and are involved in the fixation of atmospheric nitrogen.
a) proteobacteria
b) chlamydias
c) cyanobacteria
d) algae
What event is thought to have contributed to the evolution of eukaryotes?
a) global warming
b) oxygenation of the atmosphere
c) volcanic activity
d) decomposition
Structure of Bacteria:
