(b) Analogous structures leads to convergent evolution. These structures differ anatomically and have different origin but they perform similar functions.
(i) Wings of butterfly and birds: butterflies are invertebrates whereas birds belong to vertebrates. The wings in both perform a common function, flying.
(iv) Tubers of sweet potato and potato: sweet potato is a modified underground root whereas potato is a modified underground stem. Both have different origin but perform a common function, storage of food.
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