No One Is Quite Sure How Eukaryotic Cells First Appeared

Multiple Choice

No one is quite sure how eukaryotic cells first appeared on Earth.Three hypotheses have been proposed for ongoing study: the eukaryote-first hypothesis, the nucleus-first hypothesis, and _________.(Outcome #4b)

A) an hypothesis that begins with mitochondria changing into a nucleus in a prokaryotic cell
B) an hypothesis that begins with mitochondria developing in a eukaryotic cell that later lost its nucleus
C) an hypothesis that begins with mitochondria developing in a prokaryotic cell that later acquired a nucleus