If it were possible to conduct sophisticated microscopic and chemical analyses of microfossils found in 3.2-billion-year-old stromatolites, then one should be surprised to observe evidence of which of the following within such microfossils?
I.double-stranded DNA
II.a nuclear envelope
III.a nucleoid
IV.a nucleolus
V.ribosomes
A) II only
B) III only
C) II and IV
D) II, III, and IV
E) all five of these

Question

Quizplus · Accepted Answer

Evidence of a nuclear envelope (II) and a nucleolus (IV) within microfossils from 3.2-billion-year-old stromatolites would be surprising because these features are characteristic of eukaryotic cells, which are believed to have evolved much later than 3.2 billion years ago. Double-stranded DNA (I), a nucleoid (III), and ribosomes (V) are features that could be expected in both prokaryotic and eukaryotic organisms, which could have existed at that time.

If It Were Possible to Conduct Sophisticated Microscopic and Chemical