2007-02-06 11:18:19 · 8 answers · asked by Anonymous in Science & Mathematics ➔ Biology
B. At first oxygen didn't exist in the atmosphere. And i should hope the first bacteria weren't fatal.
2007-02-10 09:01:49 · answer #1 · answered by kz 4 · 0⤊ 0⤋
The first bacteria were anaerobic. They survived in what was then oceans. The bi-product they produced was oxygen. The oceans became so saturated with this oxygen that it began to escape the waters in such quantities that the atmosphere formed.
This oxygen rich environment gave rise to aerobic bacteria which gave off carbon dioxide which would then sustain the anaerobic bacteria.
Later, these two types of bacteria -- aerobic and anaerobic -- would evolve into higher life forms with the same symbiotic relationship.
2007-02-06 11:37:47 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Aerobic bacteria needs oxygen and anaerobic bacteria needs very little or no oxygen to live
2016-05-24 01:08:24 · answer #3 · answered by Anonymous · 0⤊ 0⤋
i think anaerobic
we just did that in biology class... but i got an 80%, so u decide
i think its because our atmosphere has almost no oxygen at first, but plants put it there, so early bacteria had little oxygen, so to survive, they would have to be b) anaerobic.
2007-02-06 11:29:12 · answer #4 · answered by Anonymous · 0⤊ 0⤋
B Anaerobic...Earth's early atmosphere had no O2.
2007-02-06 11:25:37 · answer #5 · answered by Ellie S 4 · 0⤊ 0⤋
B. anaerobic
There was no free oxygen around to speak of so that leaves A. and d. (which are the same and so, not the answer!) not correct. c. would not seem to apply.
2007-02-06 11:26:41 · answer #6 · answered by roynburton 5 · 0⤊ 0⤋
B anerobic,but I agree,do your own homework!
2007-02-06 11:26:58 · answer #7 · answered by stygianwolfe 7 · 0⤊ 0⤋
the right answer is.....
E. Do your OWN homeowrk!
2007-02-06 11:25:48 · answer #8 · answered by ♥chelley♥ 4 · 0⤊ 1⤋