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Species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ravenia
Ravenia ( el, Ραβένια) is a village of Epirus, Greece located 26 km south of Ioannina at an altitude of 844 m. It belongs to the municipality of Dodoni. It belongs to a group of villages called Katsaounochoria or Katsaounohoria (Κατσαουνοχώρια). Population History The settlement changed location twice. During the Byzantine Era, the population moved from the location ''Langada Eklissias'' (Λαγκάδα Εκκλησίας) and resettled to the area of ''Bogdora'' (Μπογδορά). According to oral tradition, the resettlement was made due to geological changes. After an earthquake the mountain water springs ceased as the water found other subterranean paths towards the Arachthos river. During the beginning of the Turkish period, the settlement was moved to its current location next to the monastery of 'Koimisis tis Theotokou' and one of the incentives for the relocation must have been the nearby mountain water spring. The monastery drew the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
