All of the following pieces of evidence suggest that animals existed prior to the Cambrian explosion EXCEPT:
A) macroscopic fossils from the Ediacaran period, 570 mya
B) microscopic fossils of multicellular organisms 2.1 bya
C) biomarkers from sponges 635 mya
D) molecular data showing the earliest matazoans appeared 700 mya

Question

Quizplus · Accepted Answer

Microscopic fossils of multicellular organisms 2.1 billion years ago (bya) do not specifically suggest that animals existed prior to the Cambrian explosion, as these fossils could represent non-animal multicellular life forms, not necessarily animals or metazoans. The other options directly relate to evidence supporting the existence of animals before the Cambrian explosion.

All of the Following Pieces of Evidence Suggest That Animals