Multiple Choice
Before DNA, ____ likely served as the genetic material.
A) carbohydrate
B) lipid
C) protein
D) RNA
E) free nucleotides
Correct Answer:
Verified
Correct Answer:
Verified
Q23: Four of the five answers listed below
Q24: The first fossilized eukaryotes date to about
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
Q29: Mitochondria arose from an endosymbiotic relationship between
Q30: The first O<sub>2</sub> producing organisms were probably
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