Absence of jaws. Is the answer
Mutations are when a gene is damaged or changed which alters the genetic message. This effect proteins by causing DNA strands to become altered
Answer:
Mollusks don't have legs, though some have flexible tentacles for sensing their environment or grabbing things. Most mollusk species grow a hard shell for protection, but their shell grows in only one or two pieces. It doesn't have joints like the exoskeletons of insects and crustaceans
Explanation:
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