Multiple choice

Pearls are formed inside a/an

  1. squid

  2. snail

  3. oyster

  4. mollusk
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Pearls are formed inside oysters (marine bivalve mollusks) as a defense mechanism against irritants like parasites or debris. When an irritant enters the shell, the oyster secretes nacre (mother-of-pearl) around it, gradually forming a pearl.

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