plea 15 wala pasa dunga pleasse
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1) Homologous organs are organs which have same evolutionary origin but different functions. These tell us how one species evolved into different species and thus have the same origin although having different modes of living.More common characteristics tell us how closely two species are related and how recently they had a common ancestor. E.g. - forelimbs of a human,bat, lizard etc.
2) Analogous organs are organs which have different structural origin but the same function. They tell us how two different species have evolved to perform the same function although being different in origin. E.g Wings of a bat and wings of a bird.
3) Fossils are remains or impressions of old species and thus tell us about how bodies have evolved from simple structures to complex designs that we see today. They assist in finding evolutionary relationships between organisms. For instance, the Archaeopteryx, a fossil of an organism which is believed to have been a cross between dinosaurs and birds. It had claws and teeth of a reptile and wings like that of a bird.
Hope this helps.
2) Analogous organs are organs which have different structural origin but the same function. They tell us how two different species have evolved to perform the same function although being different in origin. E.g Wings of a bat and wings of a bird.
3) Fossils are remains or impressions of old species and thus tell us about how bodies have evolved from simple structures to complex designs that we see today. They assist in finding evolutionary relationships between organisms. For instance, the Archaeopteryx, a fossil of an organism which is believed to have been a cross between dinosaurs and birds. It had claws and teeth of a reptile and wings like that of a bird.
Hope this helps.
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