Multiple Choice
The first O2 producing organisms were probably ____.
A) Archaea
B) cyanobacteria
C) green alga
D) red alga
E) plants
Correct Answer:
Verified
Correct Answer:
Verified
Q25: By one hypothesis, clay _.<br>A)facilitated assembly of
Q26: The first organisms were most probably _.<br>A)eukaryotic<br>B)multicellular<br>C)protozoans<br>D)prokaryotic<br>E)algae
Q27: What has been detected in meteorites that
Q28: Before DNA, _ likely served as the
Q29: Mitochondria arose from an endosymbiotic relationship between
Q31: Stromatolites were formed by _.<br>A)animals<br>B)heterotrophic bacteria<br>C)photosynthetic bacteria<br>D)red
Q32: A rise in oxygen in Earth's air
Q33: While it is very difficult to find
Q34: Which process or element was present first?<br>A)aerobic
Q35: The prevalence of iron-sulfide cofactors in organisms