Sentences with phrase «distinct branch on the tree»
Scientists once thought that every type of organism occupied a distinct branch on the tree of life; new species evolved as their genomes slowly mutated or recombined through sex.
http://www.sciencemag.org/ Not exact matches
Finding a new species of platypus was a surprise: Previously, researchers thought that the creatures had a single branch on their family tree, with no more than one distinct species alive at any time.