Question

bacteria description

Answer 1

bacteria are single celled microbes.
they are classified into 5 groups according to the shapes.
1. spherical (cocci)
2.rod (bacilli)
3. spiral (spirillia)
4. comma (vibrios)
5. corkscrew (spirochaetes)
they can exist as single cells in pairs, chains, clusters.
some bacteria have a extra circle on genetic area called plasmid .
the plasmid contains some genes that give the bacterium some advantage over other bacteria.
for example it may contain a gene that makes the bacterium resistant to a certain antibiotic.


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