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Exact(21)
In particular, analysis of the ranges of newly separated species, or sister species, was instrumental.
Electron transfers for [Ru bpy 3]2+ in clays are described, showing that the clay layers provide reaction fields which stabilize the resulting charge separated species.
He wrote in his journal, "When I see these Islands in sight of each other, & possessed of but a scanty stock of animals, tenanted by these birds but slightly differing in structure & filling the same place in Nature, I must suspect they are only varieties," rather than widely separated species.
What Peter meant was the influence of Mayr's theoretical dictum that recently separated species did not interbreed.
Nuthatch taxonomy is complex, with geographically separated species sometimes closely resembling each other.
The secondary, orthogonal axis of variation separated species by high levels of soluble protein (and corresponding high %N) and high densities of leaf trichomes versus species that had glabrous, tough, and chemically defended leaves (Fig 3).
Similar(39)
Cyt b also gives better resolution when separating species based on sequence data.
These were separated into species and enumerated.
Children and adults are not separate species.
It then follows that lions and tigers are separate species.
They were distant cousins, but a separate species.
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