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4 days ago · The hierarchy of biological classification's eight major taxonomic ranks. A genus contains one or more species. Minor intermediate ranks are not shown. A species (pl.: species) is a population of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. [1]
Sep 20, 2024 · Learn about the biological species concept, the ecological species concept, and the genetic species concept, and how they differ in defining and classifying species. Explore the taxonomy of animals and plants, and the evolution of species through natural selection and speciation.
Sep 25, 2024 · The most complete authoritative list of the world's species - maintained by hundreds of global taxonomists - Learn more
Sep 26, 2024 · The concept of species. Darwin sought to explain the splendid multiformity of the living world—thousands of organisms of the most diverse kinds, from lowly worms to spectacular birds of paradise, from yeasts and molds to oaks and orchids.
- Francisco Jose Ayala
Sep 27, 2024 · Taxonomy is the science of arranging living and extinct organisms in hierarchies of groups based on shared characteristics. Learn about the history, principles, and methods of taxonomy, and the Linnaean system of binomial nomenclature.
4 days 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 26, 2024 · In the following slides, we'll explore the basic characteristics all (or at least most) animals share—from snails and zebras to mongooses and sea anemones: multicellularity, eukaryotic cell structure, specialized tissues, sexual reproduction, a blastula stage of development, motility, heterotrophy, and possession of an advanced nervous system.
