The Common Ancestor of Sponges and Other Animals was Probably

Question

The common ancestor of sponges and other animals was probably
A) multicellular with tissues and a few organ systems.
B) unicellular.
C) multicellular without tissues.
D) multicellular with tissues but without organ systems.
E) multicellular with tissues and many organ systems.

Accepted Answer

The common ancestor of sponges and other animals was likely a simple multicellular organism without specialized tissues, as sponges themselves lack true tissues and organs.