Question

multiple choice 6.15 points
what is the earliest fossil evidence for life?
fossilized gels/biofilms from bacteria or archaea
zircon crystals
early fish skeletons
okenanes and okenones

Explanation:

Fossilized gels/biofilms from bacteria or archaea are among the earliest signs of life as these simple - celled organisms were present very early in Earth's history. Zircon crystals are minerals and not direct evidence of life. Early fish skeletons are from much later in the evolutionary timeline. Okenanes and okenones are biomarkers but not the earliest fossil evidence for life.

Answer:

Fossilized gels/Biofilms from Bacteria or Archaea