Bacteria:- The term Bacteria was proposed by Ehrenberg in 18 | NEET_JEE_NCERT_TRICKS
Bacteria:-
The term Bacteria was proposed by Ehrenberg in 1829. They have widespread distribution be it air, water or soil. They can survive in extreme range of temperatures like up to 78°C and -190°C.
Important characteristics of bacteria are:-
(i) Bacteria are found in all kinds of habitats.
(ii) They are prokaryotic microorganisms.
(iii) They are unicellular.
(iv) Cell wall contains peptidoglycan.
(v) An organised nucleus in absent.
(vi) Extrachromosomal self replicating DNA segments called plasmids occur in most of the bacteria.
(vii) Mitochondria, plastids, Golgi apparatus,endoplasmic reticulum and other membrane covered cell organelles are absent.
Size:-
The size of bacterial cell ranges from 1-10 Jim in length and from 0.7-1.5 flm in width.
Soon giving more notes on this :-
