Question

which two organs of two animal have different structures but similar function

Answer 1

yeah right they were called the analogous organs. Like a Pigeon and Butterflies both fly i.e same function but have different Anatomy i.e different structures.

Answer 2

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Example: The wings of birds and bats look similar. But in birds wings are covered by feathers all along the arm but the wings of bats are skin folds stretched between elongated fingers.