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What group of animals is thought to have moved onto land to become the first amphibians? |
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- What were the adaptations that improved the ability of each of the following groups to survive on land? Amphibians: Birds: Reptiles: Mammals:What traits or innovations allowed movement of animals onto land, and why might these traits have been advantageous?In what ways did theropods differ from modern birds? Give at least two differences.
- Why do you think the ancestors of the extant amphibians became successful in adapting from the life on water to life on land?Although most salamanders have four legs, a few species that live in shallow water lack hind limbs and have extremely tiny forelimbs (see photograph).Develop a hypothesis to explain how limbless salamanders came about according to Darwin’s mechanism of evolution by natural selection. How could you test your hypothesis?Professor Andrew, a paleontologist discovers a transitional fossil between a stem amniote and mammal. In 150 words express on what group of animals this might have belonged to and on their major antomical features !