Webb29 jan. 2024 · A) The hind leg bones of the whales are fossil structures from an extinct ancestor. B) The hind leg bones of the whales are analogous structures to the fins of living fish. C) The hind leg bones of the whales are homologous structures to the wings of butterflies. D) The hind leg bones of the whales are vestigial structures that had a … Webb11 apr. 2024 · A similar divergence can also be observed in the widely different evolution of the pelvic girdle and hind limb (Delsett et al. Reference Delsett, Roberts, Druckenmiller and Hurum 2024) and in the rates of body-size evolution, wherein ichthyosaurs reached gigantic sizes much earlier in their history compared with whales (Sander et al. …
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Webb10 sep. 2014 · Since evolving from land-dwelling ancestors more than 40 million years ago, whales and dolphins have lost their hind limbs and evolved a highly reduced pelvic (or … Webb20 dec. 2007 · According to Matthew Dean, one of the authors of the study, “Everyone’s always assumed that if you gave whales and dolphins a few more million years of … kirby repair shop near me
“Vestigial” whale, dolphin hip bones actually needed for, um ...
Webb27 okt. 2000 · The 27-million-year-old bone displays a deep, cuplike socket that once held the head of a thigh bone, or femur. This ancient whale, he says, appears to have had small, external legs. Barnes... Webb9 feb. 2005 · Whale skeleton showing pelvis and thigh bones (see inset). Biologists believe that for 100 million years the only vertebrates on Earth were water-dwelling … Webb7 juli 2024 · Scientists have found the first direct fossil evidence that whales once had hind legs and feetand retained smaller but functional versions of them for more than 10 million years after they left the land for a life at sea. … But in all whale fossils examined, paleontologists had yet to find limbs and feet. Can Basilosaurid walk? kirby restaurant supply longview texas