Biology, asked by Nibby, 1 year ago

Which one would it be please

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Answered by sanshri2010
1
the ans. is d
as the cyano bacteria are the 1st which have chloroform a similar to plants and they were the 1st responsible for increasing the oxygen level in the early atmosphere hence they are the 1st aerobic respiring organism which use water as h donor

Answered by Baazigar
0
Ans is 4th since they are the only prokaryotes which perform oxygenic photosynthesis as they have both PSI and PSII except nitrogen fixing BGA.

aaquibmohd968: Option.d bcoz cyanobacterium perform oxygenic photosynthesis.
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