Dappled
发表于 2025-3-25 03:58:05
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persistence
发表于 2025-3-25 08:48:42
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Mundane
发表于 2025-3-25 13:56:56
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Constituent
发表于 2025-3-25 19:36:52
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警告
发表于 2025-3-25 20:34:29
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平庸的人或物
发表于 2025-3-26 02:14:20
The Conquest of the Land by Crustacea,y of extant Crustacea illustrates some of the ways in which ancestral arthropods may have become adapted to life on land, and it is possible to gain some idea of the course of evolution by correlating the adaptations of existing species with the various environments they inhabit.
Neutral-Spine
发表于 2025-3-26 06:51:11
Dispersal and Migration,se are often difficult to assess. Not infrequently, migration enables arthropods and other animals to escape from temporarily unfavorable conditions, such as winter cold, summer drought, and seasonal absence of food. It is an adaptation of inconstant environments, and an alternative to diapause.
本土
发表于 2025-3-26 11:21:43
Palaeontology and Phylogeny,lved from segmented, worm-like ancestors, similar to today’s polychaete annelids; but fossil evidence of this is lacking. Trilobites and Crustacea are known from the Cambrian period, Eurypterida from the Ordovician, Diplopoda from the Devonian or possibly earlier, Collembola and probably Insecta als
Monocle
发表于 2025-3-26 14:40:13
Implications of Life on Land,ovement and the viscosity of water are extremely important to small protozoans, while gravity becomes increasingly important in the energetics of larger animals. The results of natural selection must be quite different on smaller than on larger organisms.
失望昨天
发表于 2025-3-26 19:53:42
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