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Updated: May 6, 2025
The species which exhibit it are not necessary related to one another in any way; often they belong to most widely distinct families; it is an adaptive resemblance alone, due to similarity of external circumstances only. The plants have to fight against the same difficulties, and they adopt for the most part the same tactics to fight them with.
Professor Houssaye, on the other hand, believes that the number and position of fins is adapted to the shape and velocity of movement of each kind of fish. If we turn to other groups of animals we find everywhere similar evidence of the distinction between adaptive and non-adaptive characters.
The other and more general departments of natural history will rise greatly in interest. The terms used by naturalists of affinity, relationship, community of type, paternity, morphology, adaptive characters, rudimentary and aborted organs, &c., will cease to be metaphorical, and will have a plain signification.
Although the cliff houses of Verde valley had been known for many years, and the ruins here described are of the same general character, anyone who examines Casa Montezuma, on Beaver creek, and compares it with Honanki, will note differences of an adaptive nature.
But the fact is an interesting commentary upon the extreme to which we sometimes carry our principle of rationalizing everything before permitting it to be mastered. I repeat that the reform movement has done excellent service in extending the recognition in education of these fundamental and inborn adaptive instincts, play, imitation, and rhythmic repetition.
Gwyn Jeffreys, the shells of some species living at a profound depth are brightly coloured, yet we generally see the lower surfaces, as well as the parts covered by the mantle, less highly-coloured than the upper and exposed surfaces. Dr. Morse has lately discussed this subject in his paper on the 'Adaptive Coloration of Mollusca, 'Proc. Boston Soc. of Nat. Hist. vol. xiv.
We see why certain characters are far more serviceable than others for classification; why adaptive characters derived from rudimentary parts, though of no service to the beings, are often of high classificatory value; and why embryological characters are often the most valuable of all.
Position of man in the animal series The natural system genealogical Adaptive characters of slight value Various small points of resemblance between man and the Quadrumana Rank of man in the natural system Birthplace and antiquity of man Absence of fossil connecting links Lower stages in the genealogy of man, as inferred, firstly from his affinities and secondly from his structure Early androgynous condition of the Vertebrata Conclusion.
The puff fish can take in a great amount of water, when disturbed, so as to become too large to be swallowed by some of its foes, illustrating another adaptive modification for self-defense.
Thus placed she looked charmingly pretty, and held herself with an air of dignity, which was a new accomplishment. Ruth was an adaptive creature, tremendously influenced by the surroundings of the moment. At home her little head was wont to droop with despondency, and the consciousness that she was poor and unknown and shabbily dressed.
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