If you examine the phylogeny of animals, you would see that
A) eyes are not present in the common ancestor of all animals.
B) sponges and placozoans have no eyes.
C) eyes are found only within the eumetazoans.
D) all of the above
E) none of the above

Question

Quizplus · Accepted Answer

The phylogeny of animals indicates that the common ancestor of all animals likely did not have eyes, as eyes are complex structures that evolved later in specific lineages. Sponges and placozoans, which are among the most basal groups of animals, indeed do not have eyes, supporting the idea that eyes are a more derived feature. Eyes are found within the eumetazoans, a group that includes all animals except sponges, placozoans, and a few other early-diverging lineages, indicating that the evolution of eyes occurred after the divergence of these basal groups.

If You Examine the Phylogeny of Animals, You Would See