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Botany

Blazing goIITian

Joined:	16 Mar 2008
Post:	1801

20 Sep 2008 16:32:37 IST

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816

classification

None

i have a serious doubt....

can anyone please explain me why archea and considered primitive to bacteria...

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SUBRAMANIYAN

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Joined: 25 Sep 2008

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26 Sep 2008 18:32:14 IST

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archae bac. has earned a special class just beacause they live in extreme conditions like high temperature,salty conditions, marshy areas ,absence of oxygen.these bacteria has special cell wall structure differing from other bacteria to survive in this extreme conditions. cell wall consists of glycoconjugate and poly-(-l-glutamide) and natrococcus.this makes them to survive.

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vignesh the cooler version of newton

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26 Sep 2008 20:17:08 IST

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hey subbu,
i know archea is a special domain of creatures, but they are considered primitive to bacteria while they show astounding similarities to eukarya.........
they are much more similar to eukarya than bacteria..

kill_my_soul

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Joined: 4 Oct 2008

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5 Oct 2008 00:50:19 IST

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kill_my_soul

New kid on the Block

Joined: 4 Oct 2008

Posts: 25

5 Oct 2008 00:52:31 IST

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ehh..archaebacteria!

yeah..they do show more similarites..to eukarya..on the basis of cell wall structure (lipid compounds) , metabolic pathways , and enzymes, especially those in 'translation' and 'transcription'!

buh..they r still considered 'primitive to bacteria' coz.. it is assumed that these were 'the most primitive organisms' that ever existed.. (considering the conditions that they adapt best to)

after them, it is assumed that prokaryotes came into being! that is , bacteria!!

Hence, it is more in the evolutionary sense of view, that we place archebacteria as primitive to bacteria!

also, the nucleoid present in the archaebacteria gives enuff evidence, that prokaryotes followed the eukarya! As the environmental conditions eased out (O₂came) , a new need for faster reproduction was realised , and hence prokaryotes were formed before eukaryotes!

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