標(biāo)題: Titlebook: Animal Life in Fresh Water; A Guide to Fresh-Wat Helen Mellanby Book 1963 Helen Mellanby 1963 evolution.invertebrates.physiology.Model inve [打印本頁] 作者: Daguerreotype 時間: 2025-3-21 19:29
書目名稱Animal Life in Fresh Water影響因子(影響力)
書目名稱Animal Life in Fresh Water影響因子(影響力)學(xué)科排名
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書目名稱Animal Life in Fresh Water網(wǎng)絡(luò)公開度學(xué)科排名
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書目名稱Animal Life in Fresh Water被引頻次學(xué)科排名
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書目名稱Animal Life in Fresh Water年度引用學(xué)科排名
書目名稱Animal Life in Fresh Water讀者反饋
書目名稱Animal Life in Fresh Water讀者反饋學(xué)科排名
作者: 審問 時間: 2025-3-22 00:13 作者: 幼稚 時間: 2025-3-22 03:21
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.作者: Inclement 時間: 2025-3-22 06:55 作者: 不整齊 時間: 2025-3-22 08:55
https://doi.org/10.1007/978-94-009-5849-4evolution; invertebrates; physiology; Model invertebrates作者: candle 時間: 2025-3-22 14:48 作者: 受辱 時間: 2025-3-22 20:53
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 Inside this the whole animal can be withdrawn.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.作者: bromide 時間: 2025-3-22 21:44 作者: BET 時間: 2025-3-23 02:17
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 Inside this the whole animal can be withdrawn.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.作者: 雜役 時間: 2025-3-23 08:28
http://image.papertrans.cn/a/image/157605.jpg作者: octogenarian 時間: 2025-3-23 09:45 作者: intercede 時間: 2025-3-23 17:32 作者: conspicuous 時間: 2025-3-23 21:12 作者: 箴言 時間: 2025-3-23 22:47 作者: cogent 時間: 2025-3-24 06:03 作者: dura-mater 時間: 2025-3-24 08:30 作者: scrape 時間: 2025-3-24 11:37
Heinrich Walter,Siegmar-W. Brecklenimals quite a few spend part of their lives in fresh water, while a much smaller number are aquatic all their lives. Many of the insect inhabitants of ponds and streams are very common, and are likely to be among the first living things to be observed by anyone beginning to study natural history. M作者: Melanocytes 時間: 2025-3-24 15:04
Heinrich Walter,Siegmar-W. Brecklef mainly land-dwelling species. Some of these latter only spend part of their lives in water. All beetles have a complex life-history, involving the stages of egg, larva (which is often rather grub-like), pupa, and finally the adult winged insect.作者: Initial 時間: 2025-3-24 22:50
Heinrich Walter,Siegmar-W. Breckle of Arachnids live in fresh water; most members of the group live on land. In Britain there is one species of aquatic spider (.) and over two hundred species of water-mites all of which belong to the .. A group of microscopic creatures, the Bear Animalcules or ., resemble the Arachnids in some respe作者: quiet-sleep 時間: 2025-3-25 01:28
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 w作者: guardianship 時間: 2025-3-25 05:35
Heinrich Walter,Siegmar-W. Breckleon. The fresh-water species are all colonial, and perhaps several hundred of the individual ‘polyps’ are found aggregated together. The individuals look superficially like Hydras, but further investigation shows that they are very different and much more complex (Fig. 190A). The members of a colony 作者: epicondylitis 時間: 2025-3-25 09:38
The Competitive Factor and Root Competition,in gutters to large lakes. All the species are microscopic, though the larger ones, which may be 2 mm. long, are visible to the naked eye as small whitish or pinkish bodies. In spite of their small size they have a complicated structure, and are made up of many different kinds of cells. They have al作者: NUDGE 時間: 2025-3-25 12:43
,Succession—Climax—Zonal Vegetation,(i.e. one . and the . under its control) are Protozoa. It is difficult, however, to give a simple definition which describes all the forms which are contained in the group for two reasons. First, because there are some members with complicated bodies and several nuclei; these, however, are not truly作者: cogent 時間: 2025-3-25 19:32 作者: Compass 時間: 2025-3-25 23:03 作者: 符合國情 時間: 2025-3-26 01:18 作者: 大門在匯總 時間: 2025-3-26 08:16
The Roundworms (,),inted at both ends and it shows no sign of segmentation such as is characteristic of the true worms. On the outside is a clear elastic cuticle which is shed four times during the period of development from egg to adult. Near the anterior end is a mouth (which is lacking in some forms). This leads th作者: 細(xì)胞膜 時間: 2025-3-26 11:11 作者: 抱狗不敢前 時間: 2025-3-26 12:58 作者: Osteoporosis 時間: 2025-3-26 18:53 作者: groggy 時間: 2025-3-26 21:57 作者: 輕推 時間: 2025-3-27 04:36 作者: Insensate 時間: 2025-3-27 08:39
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 w作者: 制造 時間: 2025-3-27 10:21 作者: SMART 時間: 2025-3-27 16:42 作者: Obvious 時間: 2025-3-27 19:52
The Protozoa,(i.e. one . and the . under its control) are Protozoa. It is difficult, however, to give a simple definition which describes all the forms which are contained in the group for two reasons. First, because there are some members with complicated bodies and several nuclei; these, however, are not truly作者: altruism 時間: 2025-3-28 01:03 作者: Hiatus 時間: 2025-3-28 03:10 作者: 簡潔 時間: 2025-3-28 07:18
Aleksandra Milo?kovi?,Nata?a Kojadinovi?. The pond sponge is found in still water only. It has a similar encrusting habit, and is characterized by a large number of finger-shaped projections on its surface (Fig. 1). It is generally a brighter green than the river sponge and it has a coarser texture.作者: Inflamed 時間: 2025-3-28 12:35 作者: 焦慮 時間: 2025-3-28 17:35
Ecosystem Engineers, Keystone Species,anus. A curious feature of the Nematodes is that the tissues of which their bodies are composed are made up of very few large cells; there are no cilia anywhere, no blood system, and no breathing organs. The eggs are covered by a hard shell. The young Nematode hatches looking very much like an adult作者: 束縛 時間: 2025-3-28 22:24
Patrick M. A. James,Marie-Josée Fortin(.) on their bodies which are arranged in groups on each segment; they are used to obtain a hold on the sides of burrows, and they are a very valuable means of identifying a specimen. Worms all have distinct heads and tails though it is sometimes difficult to see which is which, but the mouth is ove作者: Suppository 時間: 2025-3-29 02:53
Heinrich Walter,Siegmar-W. Brecklee the limbs used for locomotion (i.e. walking or swimming). The skin on the surface of the animals contains a particular substance called chitin and is waterproof. Frequently most of the skin tends to be rather hard and brittle, and movement would be difficult were it not that between the segments o作者: 急性 時間: 2025-3-29 06:28
Heinrich Walter,Siegmar-W. Breckleciliated, and the cilia make currents which collect the small organisms used as food, and transport them to the mouth. Polyzoa possess a proper gut, which terminates in an anus; ovaries and testes (they are hermaphrodites); and a rudimentary nervous system. The fresh-water polyzoa reproduce asexuall作者: panorama 時間: 2025-3-29 09:45 作者: BET 時間: 2025-3-29 12:48 作者: figment 時間: 2025-3-29 16:20 作者: acolyte 時間: 2025-3-29 21:09 作者: 漂亮才會豪華 時間: 2025-3-30 00:44
The True Worms (,),(.) on their bodies which are arranged in groups on each segment; they are used to obtain a hold on the sides of burrows, and they are a very valuable means of identifying a specimen. Worms all have distinct heads and tails though it is sometimes difficult to see which is which, but the mouth is ove作者: 外面 時間: 2025-3-30 06:29 作者: 紡織品 時間: 2025-3-30 08:36
The Polyzoa or Moss Animalcules,ciliated, and the cilia make currents which collect the small organisms used as food, and transport them to the mouth. Polyzoa possess a proper gut, which terminates in an anus; ovaries and testes (they are hermaphrodites); and a rudimentary nervous system. The fresh-water polyzoa reproduce asexuall作者: entice 時間: 2025-3-30 15:46
The Protozoa,g animals, feed by taking in complex food substances (i.e. by eating other animals, plants, or their decaying remains) which were ultimately produced by growing plants. The Protophyta feed for the most part like typical green plants — they contain chlorophyll which enables them to synthesize carbohy作者: Delirium 時間: 2025-3-30 20:03 作者: flimsy 時間: 2025-3-30 23:52 作者: 容易懂得 時間: 2025-3-31 01:40
Heinrich Walter,Siegmar-W. Brecklef ponds and streams are very common, and are likely to be among the first living things to be observed by anyone beginning to study natural history. Many of them are large enough when adult to be studied without the aid of a microscope, though a hand lens will be useful even for them, in making out the details of their structure.作者: 柏樹 時間: 2025-3-31 08:12 作者: Custodian 時間: 2025-3-31 11:04
