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Write a short note on fossils-an evidence for tracing evolutionary relationships |
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Answer» Characteristics assist us to trace the evolutionary relationship between organisms. Evolutionary relationships help us to trace who we are more close to and who is our common ancestor. A group of organisms is similar enough to be thought of together by certain characteristics. For instance, mammals and reptiles. All of them have four limbs and the basic structure of their organs is similar even though they use it for different functions. Such organs are called homologous organs. This does not mean that they share a common ancestor. Some organisms appear to be similar but basic designs are different. For instance, wings of bats and birds. Both of these animals use wings for the same function but they have different basic structures. Such organs are called analogous organs. Thus, the homologous and analogous characteristics help to trace an evolutionary relationship between different species. |
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