FORESTRY
PLANT AND WOOD ANATOMY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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scientists have found fossils of whalelike creatures that had legs
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whales perform walking motions as they swim
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whales have similar DNA to elephants
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whales breathe through lungs
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Detailed explanation-1: -A fossil of a 43-million-year-old whale that was still able to walk on land on four legs has been found in Peru. It is the first amphibious whale found in the southern hemisphere, and suggests that whales managed to swim across the South Atlantic early in their evolution.
Detailed explanation-2: -Fossils provide lots of evidence about the ancestors of whales. For example it shows that a land mammal lived between 50 million and 70 million years ago. Scientists think whales evolved from these ocean-dwelling mammals. They can tell this and more cell from a fossil.
Detailed explanation-3: -Early ancestors of the ocean’s biggest animals once walked on land. Follow their extraordinary journey from shore to sea. Although whales are expert swimmers and perfectly adapted to life underwater, these marine mammals once walked on four legs. Their land-dwelling ancestors lived about 50 million years ago.