The Contractile Machinery of Muscles is Only Found in the Most

Question

The contractile machinery of muscles is only found in the most recently diverged animal groups.

Accepted Answer

The contractile machinery of muscles is found in a wide range of animal groups, including both invertebrates (such as jellyfish and worms) and vertebrates (such as fish, reptiles, birds, and mammals). It is not limited to the most recently diverged animal groups.