Fossils of the bilaterian Ikaria wariootia found in South Australia represent one of the oldest examples of an organism with anterior and posterior differentiation, according to a study. During the ...
To most people, “symmetry” means the bilateral symmetry exhibited by, say, a butterfly, or the human face. That is, if you take a picture of a butterfly and draw a straight line down the middle of the ...
A new sunflower family tree reveals that flower symmetry evolved multiple times independently. Species of the sunflower family with or without bilateral flower symmetry. Chrysanthemum lavandulifolium ...
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