Question

multiple choice question
luca is a term used to describe the ______.

leaking underground cave acids
list of unusual classes of animals
least uniform commensal activity
last universal common ancestor
need help? review these concept resources.
read about the concept

Explanation:

LUCA is an acronym for "Last Universal Common Ancestor", which refers to the most recent organism from which all currently living organisms on Earth are descended. The other options are incorrect fabricated phrases that do not match the scientific definition of LUCA.

Answer:

last universal common ancestor