Download free homologous structures12/19/2023 The European Bioinformatics Institute already holds over 214 million structures predicted by AlphaFold2 (ref. Careful study reveals homologies where they might not be obvious.The recent developments in in silico protein structure prediction at near-experimental quality 1, 2 are advancing structural biology and bioinformatics. Over time, evolution adapted poinsettia so that some of its leaves could help attract pollinators, while oaks use their green leaves for photosynthesis. If you examine these structures closely, you will see that each is a modification of the basic leaf structure. American Beech tree photo from Brock under CC-BY-NC. Poinsettia “petals” are homologous to leaves. Yet they are homologous structures descended from an ancestral leaf. For example, at first glance, the bright red “petals” of a poinsettia plant look quite different from the leaves of a beech tree. If two homologous structures have been adapted for different roles, they may not look very much alike. Since all life shares a common ancestor, we find homologies all over the tree of life. Dragonfly photo provided by Gerald and Buff Corsi © California Academy of Sciences Butterfly photo provided by T. The wing of a dragonfly (left) and the wing of a butterfly (right) are homologous - they were both inherited from an ancient flying insect. Alfred Brousseau, Saint Mary’s College Gingko photo provided by Mike Clayton and the University of Wisconsin, Madison Virtual Foliage page. The leaves of an oak (left) and the leaves of a gingko (right) are homologous - they were both inherited from a common ancestor with leaves. Once you know what a homology is, you can find them anywhere. Information on controversies in the public arena relating to evolution.Alignment with the Next Generation Science Standards.The big issues – Pacing, diversity, complexity, and trends.Macroevolution – Evolution above the species level.Microevolution – Evolution within a population.Mechanisms: the processes of evolution – Selection, mutation, migration, and more.The history of life: looking at the patterns – Change over time and shared ancestors.An introduction to evolution: what is evolution and how does it work?.
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