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  • 30 ecosystems at risk and the endangered species that live there
    Of the 30 included, more than half—17 in all—are found in Australia The IUCN's assessments, gathered from 2013 to 2019 and released in 2019, track "species, their interactions, and the ecological processes they depend on" to assess each ecosystem's overall health
  • What we lose when animals go extinct - National Geographic
    Yet the IUCN has been able to assess only about 106,000 species of the more than 1 5 million species of animals and more than 300,000 plants that scientists have described and named—which they
  • The world’s species are playing musical chairs: how will it end?
    Plant biodiversity is doing well; fewer than 10 native species have gone extinct, and there are now 4,000 plant species on the islands, up from 2,000 before human settlers And there are more than
  • Why Male Mammals Are Monogamous | Science
    Monogamy has long fascinated scientists and the general public alike () Its occurrence in fellow mammalian species has puzzled evolutionary biologists (2–4) Male mammals have a much higher potential for producing offspring per unit time than females, making it necessary to identify selective advantages that would more than compensate for the loss of potential reproduction suffered by males
  • Chapter 23 Flashcards - Quizlet
    the process by which unique species compositions originally found in different regions slowly become more similar due to the movement of people, cargo, and species minimum viable population the smallest population size of a species that can persist in the face of environmental variation
  • 3. Reptile to mammal - Earth History
    Before that divergence the ancestral group was more generalised Unfortunately characterisation of all such groups depends heavily on fossil teeth, not soft parts, and teeth in Mesozoic mammals have turned out to be much more diverse than expected Then came the discovery of a placental dated to 125 Ma ago, in the Early Cretaceous (Ji et al 2002)
  • Monotreme - New World Encyclopedia
    Monotremes represent one of the three major subdivisions of mammals The other two groups, the marsupials (Marsupialia or Metatheria) and placentals (Placentalia or Eutheria) give birth to live young There are only five extant (living) species of monotremes, the platypus (Ornithorhynchus anatinus) and four species of echidna





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