Observations from plant breeding and animal husbandry over thousands of years has shown:
variations are limited to the confines of a particular taxon
step by step transitions between divisions or phyla have occurred
variation is the result of evolution from one species to another
observable changes from one basic kind into another have never been documented

Which supports the idea that birds and butterflies both have wings but they do not have a common ancestor with wings? the wings are analogous structures that evolved differently and do not have a similar internal structure. the wings are homologous structures that evolved differently and do not have a similar internal structure. wings of birds are vestigial structures, but the wing structures of bats are not vestigial. wings of bats are vestigial structures, but the wing structures of birds are not vestigial.

Food provides molecules that serve as fuel and building material for all organisms. plants undergo photosynthesis and make their own food. other organisms, like us and the horse seen above, are consumers and eat food. how do all organisms use food as fuel? be sure to include the name of the process in your answer. me.

2. which is the last step in the scientific method?