The Common Ancestor of All Animals is Likely to Have

Question

The common ancestor of all animals is likely to have been a ________.
A)colonial, flagellated protist
B)colonial, ciliated protist
C)colonial, flagellated bacterium
D)colonial, ciliated bacterium

Accepted Answer

The common ancestor of all animals is believed to be a colonial, flagellated protist, similar to modern choanoflagellates, which are considered the closest living relatives of animals.