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  • Chapter 4 Flashcards - Quizlet
    Study with Quizlet and memorize flashcards containing terms like According to the International Union for Conservation of Nature (IUCN), about ____% of all known amphibian species are threatened with extinction 15 24 33 49 67, Compounds found in the ____ of certain amphibians have been isolated and used in pharmaceutical products skin secretions gut contents fatty tissue brain matter saliva
  • 6. 1: Species Diversity as a Surrogate for Global Biodiversity
    No headers Global biodiversity is frequently expressed as the total number of species currently living on Earth, i e , its species richness Between about 1 5 and 1 75 million species have been discovered and scientifically described thus far (LeCointre and Guyader, 2001; Cracraft, 2002)
  • Amphibians - Toads | Better Planet Education
    There are two species of toad found in Britain, and both these are native By far the most numerous is the common toad (Bufo bufo) It has a rough, warty skin, generally brown in colour with darker spots A toad's movements are much slower than a frog's, and it crawls along, sometimes jumping a little, but does not leap as a frog does
  • Amphibians | EARTH 103: Earth in the Future - John A. Dutton . . .
    When the amphibians evolved from the fish, this strategy gave them the ability to search for new sources of food, namely plants on land Thus, even though amphibians could forage away from the water, they had to return to it to reproduce Later on, some amphibian species developed the ability to lay their eggs in moist substrates such as leaf
  • Current extinction rates of reptiles and amphibians - PNAS
    Regardless, there are many good reasons to think the counts are conservative: (i) the analytical method is designed to infer less extinction when data are lacking or when a species is found in multiple areas; (ii) it is also unlikely to detect extinctions that have occurred within the last decade or two ; (iii) the results have been skewed
  • Climate change in Antarctica - Wikipedia
    Nearly all of the species in the Antarctic are marine; by 2015, 8,354 species had been discovered in Antarctica and taxonomically accepted; of these species, only 57 were not marine [110] Antarctica may have up to 17,000 species; [ 111 ] while 90% of the ocean around Antarctica is deeper than 1,000 m (3,281 ft), only 30% of the benthic-sample
  • Red List of Mediterranean Amphibians - IUCN
    115 species of amphibians (frogs, toads, newts and salamanders) are found in Mediterranean countries, a much higher number than that found in central and northern Europe 28 7% of the Mediterranean’s amphibians are threatened with extinction One species is already extinct: the painted frog Discoglossus nigriventer, an endemic of Israel





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