By Diana R. Kershaw (auth.)
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Age variety: eight - 12 Years
Table of Contents
Chapter 1 the diversity of Animal lifestyles 12
Chapter 2 type and behaviour 33
Chapter three Animals with out Backbones 50
Chapter four Animals with Backbones 61
For additional info 80
Index eighty four
From the authors of The Evolution and Extinction of the Dinosaurs comes an creation to the examine of dinosaurs for non-specialists designed to excite readers approximately technology by utilizing dinosaurs to demonstrate and speak about geology, normal heritage and evolution. whereas concentrating on dinosaurs it additionally makes use of them to exhibit different points of the traditional sciences, together with primary recommendations in evolutionary biology, body structure, lifestyles background, and systematics.
This booklet addresses the elemental problems with predator-prey interactions, with an emphasis on predation between arthropods, which were larger studied, and for which the database is extra huge than for the massive and infrequent vertebrate predators. The ebook may still attract ecologists drawn to the huge factor of predation results on groups.
Zoogeography goals to give an explanation for the constitution, functionality and historical past of the geo graphical levels of animals. The absence or presence of a species in a given position has ecological in addition to old factors. it truly is accordingly a mistake to feel that reconstructing the phylogenetic connections of a taxon will on its own provide a distinct photograph of ways its variety originated.
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Extra resources for Animal Diversity
For example, some small marine sponges are always found in association with hermit crabs. This is a commensal relationship which benefits both, the hermit crab gaining protection and the sponge gaining mobility. Reproduction The Porifera show both sexual and asexual reproduction. In many sponges the capacity for asexual reproduction is considerable, new individuals being produced from buds which may develop in any region of the body or from fragments of the parent sponge. Another common method of asexual reproduction involves the formation of gemmules.
Virtually all motile unicellular organisms have been included in this huge phylum with little regard to their evolutionary relationships. Because of this the members of the Protozoa show much more diversity than is usual between the members of a phylum. Indeed there is a good case for regarding the Protozoa as representing not one, but several phyla, at the same level of organization. Protozoan diversity It is impossible in the space available to give more than a limited idea of the diversity achieved in both mode of life 29 Phylum Protozoa and morphology by the phylum Protozoa.
Firstly, the adult parasite has a very simple structure in comparison with a free-living protozoan such as Paramecium; and secondly, reproduction yields a vast number of potential individuals. Both characteristics are related to the parasitic mode of life. Food is freely and easily available with competition virtually absent, and surroundings more uniform. This ideal situation does have one drawback: the earthworm does not have an unlimited number of seminal vesicles and the progeny must be transferred to another host worm.
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