What do homologous organs indicate?

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(B) Homologous organs indicate common ancestry.Homologous organs are defined as organs that share the same fundamental anatomical structure and develo

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Common ancestry

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(B) Homologous organs indicate common ancestry.Homologous organs are defined as organs that share the same fundamental anatomical structure and developmental origin but perform different functions. These organs follow the same basic plan of organization during embryonic development. However,in the adult stage,they are modified to perform diverse functions as an adaptation to different environments.Homologous organs are the result of divergent evolution. Examples include the thorns of $Bougainvillea$ and the tendrils of $Cucurbita$,both of which arise in the axillary position.Divergent evolution involves the accumulation of differences between groups,which can lead to the formation of new species. This typically occurs when populations of the same species disperse into different and isolated environments,blocking gene flow and allowing for the fixation of distinct characteristics through genetic drift and natural selection. The vertebrate limb is a classic example of divergent evolution,where limbs in different species share a common origin but have diverged in overall structure and function.

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