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Phylum

  • Kartonierter Einband
  • 124 Seiten
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Al... Weiterlesen
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Beschreibung

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Although "phylum" is often used as if it were a clearly defined term, no satisfactory definition of it exists. In fact, "phylum" may be a misnomer indicative of ignorance. Consequently the number of phyla varies from one author to the next. The relationships among phyla are becoming increasingly well known, and larger clades can be found to contain many of the phyla. Informally, phyla can be thought of as grouping organisms based on general body plan, as well as developmental or internal organizations. For example, though seemingly divergent, spiders and crabs both belong to Arthropoda, whereas earthworms and tapeworms, similar in shape, are from Annelida and Platyhelminthes, respectively. Although the International Code of Botanical Nomenclature allows the use of the term "phylum" in reference to plants, the term "Division" is almost always used by botanists. The best known animal phyla are the Mollusca, Porifera, Cnidaria, Platyhelminthes, Nematoda, Annelida, Arthropoda, Echinodermata, and Chordata, the phylum to which humans belong, along with all other vertebrate species, as well as some invertebrates such as the lamprey.

Produktinformationen

Titel: Phylum
Editor:
EAN: 9786130986766
Format: Kartonierter Einband
Genre: Sozialwissenschaften allgemein
Anzahl Seiten: 124
Gewicht: g
Größe: H220mm x B220mm