What does Haikouichthys, a fossilized early vertebrate, have in common with other living vertebrates?
A) a spinal canal surrounded by vertebrae, which was supported by a notochord
B) dark spots at the front of the body, resembling eyes
C) a skull that may have held a primitive brain
D) all of the above

Question

Quizplus · Accepted Answer

Haikouichthys, an early vertebrate, shares several key features with living vertebrates, including a spinal canal supported by a notochord, dark spots suggesting eyes, and a skull potentially housing a primitive brain. These characteristics are foundational to the vertebrate lineage.

What Does Haikouichthys, a Fossilized Early Vertebrate, Have in Common