Daguerreotype 发表于 2025-3-21 19:29:48
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Introduction,This book is intended to help all who are interested in freshwater animal life to identify the animals which they find, and to discover more about their ways of living. I hope that it will be useful to people of school age as well as to more serious students of Natural History.Inclement 发表于 2025-3-22 06:55:43
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https://doi.org/10.1007/978-94-009-5849-4evolution; invertebrates; physiology; Model invertebratescandle 发表于 2025-3-22 14:48:08
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Heinrich Walter,Siegmar-W. Breckleon, a fold of the body wall (mantle) outside which is usually a hard external shell. Inside this the whole animal can be withdrawn. Most of the fresh-water forms are reasonably large so that their habits can be studied in a laboratory or classroom without the aid of a microscope; many species live well in an aquarium.bromide 发表于 2025-3-22 21:44:02
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The Mollusca,on, a fold of the body wall (mantle) outside which is usually a hard external shell. Inside this the whole animal can be withdrawn. Most of the fresh-water forms are reasonably large so that their habits can be studied in a laboratory or classroom without the aid of a microscope; many species live well in an aquarium.杂役 发表于 2025-3-23 08:28:15
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