Question

question 3/6 which of the following describes an evolutionary adaptation in cnidaria a. skeleton made of spicules b. primitive nervous system c. intracellular digestion d. anal pore

Explanation:

Cnidaria have a primitive nervous system called a nerve net which helps them sense their environment and respond to stimuli, an important evolutionary adaptation. Spicules are more associated with sponges. Intracellular digestion is not a unique or key adaptation for Cnidaria. Cnidaria do not have an anal pore as they have a gastrovascular cavity with a single opening for both ingestion and egestion.

Answer:

B. primitive nervous system