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Sea anemone (Adamsia) is marine animal attached to the empty shell of gastropods occupied by hermit crab. They live as symbionts, not as parasites.

1. a) True for all
2. b) True for Adamsia only
3. c) True for gastropods only
4. d) True for hermit crab only

Correct answer: a) True for all

Solution

Adamsia and hermit crab show mutualism: the sea anemone gets transport and food scraps, while the crab gains protection. The gastropod shell is just the structure involved, so the statement is considered true for all listed components in this context.

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