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

question 57

Multiple Choice

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

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Definitions:

Ostracism

The exclusion or rejection from a society or group.

Aggressive

Behaviors or tendencies characterized by hostility or the intention to cause harm to others, whether physically or verbally.

Physical Pain

A distressing sensation and emotional experience that is linked to actual or potential tissue damage or described in terms of such damage.

Ostracism

The social or physical exclusion of an individual or group from a society or group.