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Sep 6, 2024 · A species (pl.: 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. [1] . It is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity.
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Cloud species, in meteorology, the taxonomic rank below the...
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- On the Origin
On the Origin of Species (or, more completely, On the Origin...
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4 days ago · A classic book by Charles Darwin that introduced the scientific theory of evolution by natural selection and common descent. Learn about the background, evidence, and impact of his work, as well as the controversies and debates it sparked.
- Charles Darwin
- 1859
1 day ago · Biodiversity (or biological diversity) is the variety and variability of life on Earth. It can be measured on various levels. There is for example genetic variability, species diversity, ecosystem diversity and phylogenetic diversity. [ 1 ] Diversity is not distributed evenly on Earth.
Sep 12, 2024 · Charles Darwin - Evolution, Natural Selection, Species: England became quieter and more prosperous in the 1850s, and by mid-decade the professionals were taking over, instituting exams and establishing a meritocracy.
- Adrian J. Desmond
2 days ago · biodiversity, the variety of life found in a place on Earth or, often, the total variety of life on Earth. A common measure of this variety, called species richness, is the count of species in an area.
1 day ago · There are currently 1,258 genera, 161 families, 27 orders, and around 5,937 recognized living species of mammal. [1] Mammalian taxonomy is in constant flux as many new species are described and recategorized within their respective genera and families.
5 days ago · Animal, any of a group of multicellular eukaryotic organisms thought to have evolved independently from the unicellular eukaryotes. Animals differ from other multicellular eukaryotes, the plants and the fungi, in morphology and physiology in that animals evolved muscles, which allow them to be mobile.
