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  • 【GMAT考满分阅读RC题库】There are recent reports of apparently drastic . . .
    Anecdotal reports of population decreases cannot distinguish among these possibilities, and some amphibian populations have shown strong fluctuations in the past It is indisputably true that there is simply not enough long-term scientific data on amphibian populations to enable researchers to identify real declines in amphibian populations
  • Amphibians: Evolution, Metamorphosis and Indicator Species
    Habitat loss and conversion, environmental contamination, emerging infectious diseases and climate change are some of the most severe ways in which amphibian species and their survival are threatened More than 23% of animals listed on the Red List are amphibians They are therefore also seen as indicator for the environmental health of ecosystems
  • Frogs | Australian Museum FrogID Project
    More than 250 species of frog are scientifically known from Australia Explore our frog profiles to discover all kinds of facts about Australia's frogs About FrogID Week FrogID Map Science Schools Australia's Frogs Login
  • The evolution of parental care diversity in amphibians - PMC
    Parental care can take many forms but how this diversity arises is not well understood Here, the authors compile data for over 1300 amphibian species and show that different forms of care evolve at different rates, prolonged care can be easily reduced, and biparental care is evolutionarily unstable
  • BIO 152 Week 11 Flashcards - Quizlet
    amphibians: - Amphibians have a three-chambered heart that has two atria and one ventricle rather than the two-chambered heart of fish The two atria (superior heart chambers) receive blood from the two different circuits (the lungs and other body systems), and then there is some mixing of the blood in the heart's ventricle (inferior heart
  • 2. 2. 3: Reptiles and Amphibians - Biology . . . - Biology LibreTexts
    Amphibians Amphibians include organisms such as frogs, toads, newts, and salamanders, which all live in bodies of fresh water Their thin skins allow them to absorb oxygen from the air around them (supplemented by their gills (young) or lungs (adult) This feature results in many species being considered as indicator species
  • Amphibian Classification ( Read ) | Biology - CK-12 Foundation
    Frogs and toads are closely related, but they differ in several ways Generally, frogs spend more time in water, and toads spend more time on land As you can see from Figure below, frogs also have smoother, moister skin than toads, as well as longer hind legs Frog and Toad Frogs (a) and toads (b) are placed in the same amphibian order





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