20. 2B: Building Phylogenetic Trees - Biology LibreTexts Consequently, all of these organisms also have amniotic eggs and make a single clade, also called a monophyletic group Clades must include all of the descendants from a branch point Figure \(\PageIndex{1}\): Common ancestors: Lizards, rabbits, and humans all descend from a common ancestor that had an amniotic egg
Brains, tools, innovation and biogeography in crows and ravens Background Crows and ravens (Passeriformes: Corvus) are large-brained birds with enhanced cognitive abilities relative to other birds They are among the few non-hominid organisms on Earth to be considered intelligent and well-known examples exist of several crow species having evolved innovative strategies and even use of tools in their search for food The 40 Corvus species have also been
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Synthesis of phylogeny and taxonomy into a . . . - PNAS When source phylogenies are absent or sparsely sampled, taxonomic hierarchies provide structure and completeness (11, 12) Given the limits of data availability, synthesizing phylogeny and taxonomic classification is the only way to construct a tree of life that includes all recognized species
Principles of metabolome conservation in animals - bioRxiv The magnitude of concentration differences among the 26 species varies widely across metabolites in all studied organs (Suppl Fig S1) For example, in liver, cytidine level varies up to 529-fold among species, while malate shows highly similar concentrations in all species, with less than 2 3-fold differences (Fig 1A)
7. 4: Perspectives on the Phylogenetic Tree - Biology LibreTexts Many phylogenetic trees have been shown as models of the evolutionary relationship among species Phylogenetic trees originated with Charles Darwin, who sketched the first phylogenetic tree in 1837 (Figure \(\PageIndex{1}\)a), which served as a pattern for subsequent studies for more than a century