Question

cambrian web quest
what did many creature living in the cambrians seas develop for defense? choose 3.
sense of humor
spikes
shells
teeth
scales
odor

Explanation:

During the Cambrian period, many marine creatures developed physical structures for defense. Spikes could deter predators. Shells provided a protective covering. Scales could also offer some level of protection. A sense of humor is a complex cognitive trait not relevant to physical defense in ancient marine life. Teeth are more for feeding. Odor - based defense mechanisms are more complex and not as commonly associated with the early Cambrian marine fauna's primary defense structures.

Answer:

spikes, shells, scales