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homologous structures
The study of how structures function is called physiology.
homologous structures
They don't, vestigial structures are biological structures with no known function that evolved from structures in distant ancestors that used to have a function that is no longer needed.
They may have had an important function in the past.
The cell structures is found in protoplasm. It is what helps the cells function.
The sole is a part of the hoof. The function of the sole is to give protection to the sensitive inner structures and help support weight.
The structure is important because each enzyme's shapes allows only certain reactants to bind the enzyme.
Spleen
they give birth to live young
Vestigial organs.
the people