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Question
Which of the following includes analogous structures?
Which of the following includes analogous structures?
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Solution
The correct option is A Wings of bat and pigeon
The wings of bats consist of stretched skin between bones of the fingers whereas the wings of a pigeon consists of feathers covered over its skin. The dissimilarities in both the wings suggest inheritance from different ancestors, thus these two structures are analogous.
Sometimes it is unclear whether similarities in structure in different organisms are analogous or homologous. An example of this is the wings of bats and birds. These structures are homologous in that they are in both cases modifications of the forelimb bone structure of early reptiles. But birds’ wings differ from those of bats in the number of digits and in having feathers for flight while bats have none. And most importantly, the power of flight arose independently in these two different classes of vertebrates; in birds while they were evolving from early reptiles, and in bats after their mammalian ancestors had already completely differentiated from reptiles. Thus, the wings of bats and birds can be viewed as analogous rather than homologous upon a more rigorous scrutiny of their morphological differences and evolutionary origins.
Vertebrates hearts are homologous structures and so are their brains. They show common pattern, but increasing complexity.
The thorns of Bougainvillea and the tendrils of Cucurbita are both stem modifications derived from axillary buds, hence these are also homologous structures.
Flippers(forelimbs) of Dolphins and the forelimbs of a horse are homologous structures ad both are mammals and have their forelimbs are suited for different functions,
The wings of bats consist of stretched skin between bones of the fingers whereas the wings of a pigeon consists of feathers covered over its skin. The dissimilarities in both the wings suggest inheritance from different ancestors, thus these two structures are analogous.
Sometimes it is unclear whether similarities in structure in different organisms are analogous or homologous. An example of this is the wings of bats and birds. These structures are homologous in that they are in both cases modifications of the forelimb bone structure of early reptiles. But birds’ wings differ from those of bats in the number of digits and in having feathers for flight while bats have none. And most importantly, the power of flight arose independently in these two different classes of vertebrates; in birds while they were evolving from early reptiles, and in bats after their mammalian ancestors had already completely differentiated from reptiles. Thus, the wings of bats and birds can be viewed as analogous rather than homologous upon a more rigorous scrutiny of their morphological differences and evolutionary origins.
Vertebrates hearts are homologous structures and so are their brains. They show common pattern, but increasing complexity.
The thorns of Bougainvillea and the tendrils of Cucurbita are both stem modifications derived from axillary buds, hence these are also homologous structures.
Flippers(forelimbs) of Dolphins and the forelimbs of a horse are homologous structures ad both are mammals and have their forelimbs are suited for different functions,
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