Question

cambrian web quest
the pikala was an early type of, an ancestor of humans!
chordate
warm blooded
land dweller
mammal

Explanation:

Pikaia is an early chordate. Chordates are a group that includes vertebrates (like humans) and their close relatives. Warm - blooded is a characteristic (not a taxonomic group). Land dwellers are a habitat - based group. Mammals are a more specific group within chordates that evolved much later than Pikaia. Pikaia has key chordate features like a notochord.

Answer:

chordate