Question

Distinguish between bacteria, archaebacteria and eubacteria.

Answer 1

Bacteria:

Bacteria is a prokaryotic, unicellular organism. Bacteria are found everywhere, they are the most abundant living organisms. They can thrive in extreme conditions like hot springs, snow, deep ocean, where it is difficult for other organisms to live.

Archaebacteria:

Archaebacteria are autotrophic organisms that derive energy from the oxidation of chemicals for their metabolic activities.

Eubacteria:

These bacteria possess an outer cell wall that surrounds the plasma membrane. The plasma membrane surrounds the cytoplasm with ribosomes.

Differences between bacteria, archaebacteria and eubacteria

S.No	Characteristics	Bacteria	Archaebacteria	Eubacteria
1.	Type of cell	It's cell type is prokaryotic.	It's cell type is prokaryotic.	The cell type of eubacteria is eukaryotic.
2.	Nuclear envelope	The nuclear envelope is absent.	The nuclear envelope is absent.	The nuclear envelope is present.
3.	Number of chromosomes	Only one chromosome is available.	Only one chromosome is available.	More than one chromosome is available.
4.	Organelles	Organelles are absent.	Organelles are absent.	Organelles are present.
5.	Cytoskeleton	The cytoskeleton is absent in bacteria.	The cytoskeleton is absent in archaebacteria.	The cytoskeleton is present in eubacteria.