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Question
Evolution of the pandas thumb and evolution of the mammalian ear ossicles are examples of ______.
Options
adaptive radiation
convergent evolution
differential reproduction
historical opportunism
MCQ
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Solution
Evolution of the pandas thumb and evolution of the mammalian ear ossicles are examples of historical opportunism.
Explanation:
These examples illustrate how existing anatomical structures were opportunistically modified during evolution to serve new functions. The panda’s “thumb” is an enlarged wrist bone adapted for grasping bamboo, and the mammalian ear ossicles evolved from jawbones of ancestral reptiles, demonstrating evolutionary re-purposing of existing structures rather than adaptive radiation or convergent evolution.
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