Respuesta :
• Homologous structures: Both Ostriches have wings similar in form to those of their ancestors, but that do not allow the birds to fly.
Homologous structures are those that have structural similarities but are different in function. For example, if we look at the anatomical structure of a bird’s wing, it is very similar in structure with a human arm. However, over the course of time they have evolved to perform different functions.
• Vestigial structures: The inner ear bones of mammals have evolved from bones that form the jaws of reptiles.
Vestigiality refers to the process in which some structure lose their function over the course of evolution in some specie but they are functionally normal in other species. Such a structure is the inner ear bones of mammals which donot perform an important function in mammals but do perform in reptiles.
• DNA sequence data: Both Genes involved in RNA replication are conserved among bacteria and animals, suggesting a common evolutionary origin.
The sequencing of genetic data is an excellent method of finding the evolutionary histories and relatedness of different organisms. This field of sciences is called phylogenetics and the mentioned example is the result of phylogenetics.
• Analogous structures: The jointed legs of insects and vertebrates arose independently, indicating a different evolutionary origin.
Analogous structures are those that have similar function but they look very different in structure or anatomy. This is because they have been evolved from different ancestors and perform different functions. One example of these structures is mentioned, The jointed legs of insects and vertebrates that look different bur perform same function.
The jointed legs of insects and vertebrates refer to 'analogous structures', the inner ear bones of mammals refers to 'vestigial structures', ostriches wings refer to 'homo-logous structures', and genes refers to ''DNA sequence data".
- Homo-logous structures are structures that have a common evolutionary origin, which may or not have the same function.
- Analogous structures are structures that have similar (or the same) functions but they have different evolutionary origins.
- Vestigial structures refer to structures or body parts that have no function and are supposed to be residual parts from a past ancestor.
- DNA sequence data refer to the order of nucleotides in a particular DNA sequence.
In conclusion, the jointed legs of insects and vertebrates refer to 'analogous structures', the inner ear bones of mammals refers to 'vestigial structures', ostriches wings refer to 'homo-logous structures', and genes refers to ''DNA sequence data".
Learn more about homologous structures here:
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