Against the special creation of mimicking5 species there are all the objections and difficulties in the way of special creation in other cases, with the addition of a few that are peculiar6 to it. The most obvious is, that we have gradations of mimicry and of protective resemblance — a fact which is strongly suggestive of a natural process having been at work. Another very serious objection is, that as mimicry has been shown to be useful only to those species and groups which are rare and probably dying out, and would cease to have any effect should the proportionate abundance of the two species be reversed, it follows that on the special-creation theory the one species must have been created plentiful7, the other rare; and, notwithstanding the many causes that continually tend to alter the proportions of species, these two species must have always been specially8 maintained at their respective proportions, or the very purpose for which they each received their peculiar characteristics would have completely failed. A third difficulty is, that although it is very easy to understand how mimicry may be brought about by variation and the survival of the fittest, it seems a very strange thing for a Creator to protect an animal by making it imitate another, when the very assumption of a Creator implies his power to create it so as to require no such circuitous9 protection. These appear to be fatal objections to the application of the special-creation theory to this particular case.
The other two supposed explanations, which may be shortly expressed as the theories of “similar conditions” and of “heredity,” agree in making mimicry, where it exists, an adventitious10 circumstance not necessarily connected with the well-being11 of the mimicking species. But several of the most striking and most constant facts which have been adduced, directly contradict both those hypotheses. The law that mimicry is confined to a few groups only is one of these, for “similar conditions” must act more or less on all groups in a limited region, and “heredity” must influence all groups related to each other in an equal degree. Again, the general fact that those species which mimic others are rare, while those which are imitated are abundant, is in no way explained by either of these theories, any more than is the frequent occurrence of some palpable mode of protection in the imitated species. “Reversion to an ancestral type” no way explains why the imitator and the imitated always inhabit the very same district, whereas allied12 forms of every degree of nearness and remoteness generally inhabit different countries, and often different quarters of the globe; and neither it, nor “similar conditions,” will account for the likeness13 between species of distinct groups being superficial only — a disguise, not a true resemblance; for the imitation of bark, of leaves, of sticks, of dung; for the resemblance between species in different orders, and even different classes and sub-kingdoms; and finally, for the graduated series of the phenomena14, beginning with a general harmony and adaptation of tint15 in autumn and winter moths16 and in arctic and desert animals, and ending with those complete cases of detailed17 mimicry which not only deceive predacious animals, but puzzle the most experienced insect collectors and the most learned entomologists.
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1 remarkable | |
adj.显著的,异常的,非凡的,值得注意的 | |
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2 mimic | |
v.模仿,戏弄;n.模仿他人言行的人 | |
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3 mimicry | |
n.(生物)拟态,模仿 | |
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4 illustrate | |
v.举例说明,阐明;图解,加插图 | |
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5 mimicking | |
v.(尤指为了逗乐而)模仿( mimic的现在分词 );酷似 | |
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6 peculiar | |
adj.古怪的,异常的;特殊的,特有的 | |
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7 plentiful | |
adj.富裕的,丰富的 | |
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8 specially | |
adv.特定地;特殊地;明确地 | |
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9 circuitous | |
adj.迂回的路的,迂曲的,绕行的 | |
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10 adventitious | |
adj.偶然的 | |
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11 well-being | |
n.安康,安乐,幸福 | |
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12 allied | |
adj.协约国的;同盟国的 | |
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13 likeness | |
n.相像,相似(之处) | |
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14 phenomena | |
n.现象 | |
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15 tint | |
n.淡色,浅色;染发剂;vt.着以淡淡的颜色 | |
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16 moths | |
n.蛾( moth的名词复数 ) | |
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17 detailed | |
adj.详细的,详尽的,极注意细节的,完全的 | |
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