Results 201 to 210 of about 18,836 (239)
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1989
The arthropods are distinguished by having segmented bodies and appendages, as well as hardened external skeletons. Growth is achieved by shedding the exoskeleton and then regenerating a new and larger one. The hardening of the exoskeleton usually occurs by chemical cross-linking (sclerotization) of the macromolecular constituents, mostly proteins and ...
Heinz A. Lowenstam, Stephen Weiner
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The arthropods are distinguished by having segmented bodies and appendages, as well as hardened external skeletons. Growth is achieved by shedding the exoskeleton and then regenerating a new and larger one. The hardening of the exoskeleton usually occurs by chemical cross-linking (sclerotization) of the macromolecular constituents, mostly proteins and ...
Heinz A. Lowenstam, Stephen Weiner
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1963
The number of different kinds of insects in the world far outnumbers all the other species of animals and plants put together. Of this huge class of animals 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
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The number of different kinds of insects in the world far outnumbers all the other species of animals and plants put together. Of this huge class of animals 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
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1963
The Arachnids are a subdivision of the Arthropods and they include the Spiders, Scorpions, King Crabs, Ticks and Mites. Only a relatively small number of Arachnids live in fresh water; most members of the group live on land. In Britain there is one species of aquatic spider (Argyroneta aquatica) and over two hundred species of water-mites all of which ...
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The Arachnids are a subdivision of the Arthropods and they include the Spiders, Scorpions, King Crabs, Ticks and Mites. Only a relatively small number of Arachnids live in fresh water; most members of the group live on land. In Britain there is one species of aquatic spider (Argyroneta aquatica) and over two hundred species of water-mites all of which ...
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1963
The Arthropods in their numbers and in their variety of species far exceed all the rest of the animal kingdom put together. Of the animals which live in fresh water a high proportion belong to this phylum. The name ‘Arthropod’ means jointed limbs, the most characteristic feature of the phylum being the fact that the numerous limbs on the body are made ...
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The Arthropods in their numbers and in their variety of species far exceed all the rest of the animal kingdom put together. Of the animals which live in fresh water a high proportion belong to this phylum. The name ‘Arthropod’ means jointed limbs, the most characteristic feature of the phylum being the fact that the numerous limbs on the body are made ...
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The position of the Arthropoda in the phylogenetic system
Journal of Morphology, 1998Traditionally, Panarthropoda (Euarthropoda, Onychophora, Tardigrada) are regarded as being closely related to Annelida in a taxon Articulata, but this is not supported by molecular analyses. Comparisons of gene sequences suggest that all molting taxa (Panarthropoda, Nematoda, Nematomorpha, Priapulida, Kinorhyncha, Loricifera) are related in a ...
Ulrich Ehlers +4 more
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The Collagen of the Arthropoda
1985Collagen has been described in several regions of the arthropod body, but this molecule does not perform the ubiquitous connective tissue role as is evident in both Vertebrata and Inverte-brata. The Arthropoda, despite the widespread occurrence of collagen fibrils, are characterized by the relative scarcity of connective elements; there is also a ...
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Diversity and evolution of the animal virome
Nature Reviews Microbiology, 2022Erin Harvey, Edward C Holmes
exaly