homologous structures
the species come from a common ancestor
A homologous structure.
Recency of common ancestry. Species A is more closely related to species B than to species C if (and only if) the last common ancestor of A and B lived more recently than the last common ancestor of A and C. The concept can be applied not just to species but also to organism, populations, or genes.
Homologous structures are different forms of animal anatomy which have come from the some origin (a common ancestor), these can be extremely different in appearance and function. For example a bats wing, a seals flipper and a human arm all have common bone and muscle structures suggesting that they all derived from a common ancestor. Vestigial structures are parts of the anatomy which have lost their original function through the evolutionary process and no longer obtain a major functional role in that animals life. For example in human the appendix's original function was to break down cellulose in plant material, other vestigial functions in humans include the coccyx (tailbone) and ear muscles.
descended from a common ancestor
what is Similar structures that related species have inherited from a common ancestor
Homologous structures!
Homologous structures.
Homologous structures!
Homologous structures.
what is Similar structures that related species have inherited from a common ancestor
ancestor
DNA sequences
Related species have inherited homologous traits from a common ancestor.
Homologous structures.
Why do scientists think related species have similar body structures and development patterns?
A taxon of closely related species that share a recent common ancestor is a genus.