The Most Abundant Prokaryotic Organism in the Ocean is of the ________

Question

The most abundant prokaryotic organism in the ocean is of the ________ genus.
A) Pelagibacter
B) Puniceispirillum
C) Roseobacter
D) Prochlorococcus

Accepted Answer

Pelagibacter, specifically Pelagibacter ubique, is one of the most abundant and smallest free-living prokaryotic organisms in the ocean, belonging to the SAR11 clade.