...Such an adaptive resemblance could not ofcourse exist if it laid its eggs in the nests of more than one species,and it is certainly a circumstance eminently favourable to preservation...
P. L. Sclater 「Argentine Ornithology, Volume I (of 2)」
...Dentitional phenomena in cobras and other elapids with notes on adaptive modifications of fangs...
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...It is nowrecognized that the bill is a highly adaptive structure and that itfrequently shows convergence and parallelism...
William B. Stallcup 「Myology and Serology of the Avian Family Fringillidae」
...The intricatepatterns of origin and of insertion seem to remain almost the samethroughout the order in spite of adaptive radiation which has occurred...
William B. Stallcup 「Myology and Serology of the Avian Family Fringillidae」
...The distributional limits of a species are useful in indicatingcertain of its adaptive capacities and implying maintenance of orshifts in characteristics of habitats...
Richard F. Johnston 「The Breeding Birds of Kansas」
...This can beinterpreted as a measure of the frequency of adaptive plasticityversus adaptive conservatism; five of the 24 plottings show a plasticcharacter, 19 a conservative...
Richard F. Johnston 「The Breeding Birds of Kansas」
...Most students of breeding schedules believe that sincethese are highly adaptive, they must also be capable of flexibility tomeet variable environments within the range of the species...
Richard F. Johnston 「The Breeding Birds of Kansas」
...In them, pale soil and low relative humidity are importantpassive factors of selection that give adaptive value to the palecolors of pelage of both infernatis and handleyi...
Robert L. Packard 「Speciation and Evolution of the Pygmy Mice, Genus Baiomys」
...The pallor of the former, that lives on generallypaler soils, presumably is of adaptive value...
Robert L. Packard 「Speciation and Evolution of the Pygmy Mice, Genus Baiomys」
...As yet there is no clear evidence that reduction ofthe zygomatic arch is of adaptive value...
John M. Legler 「Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz」
...Why arerobins so abundant? Because they are so adaptive,both as regards their food and their nesting-habits...
John Burroughs 「Ways of Nature」
...All suchcases show how plastic and adaptive instinct is, atleast in relation to food supplies...
John Burroughs 「Ways of Nature」
...Evidently many of the coelacanths, Latimeria for example, arepredators (Smith, 1939:104); to such fishes a more efficient catchingand swallowing mechanism would be an adaptive improvement...
Joan Echols 「A New Genus of Pennsylvania Fish (Crossoperygii, Coelacanthiformes) from Kansas」
...They may have done sooriginally, but we must remember that the embryonic life itself has beensubject to adaptive changes for millions of years...
Ernst Haeckel 「The Evolution of Man」
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