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What evidence supports the hypothesis that whales were land dwelling mammals?
they had hip bones
What evidence supports the hypothesis that whales evolved from land-dwlling mammals?
Theory of evolution
How do we know modern whales are related to ancient mammals?
Modern whales are believed to be related to ancient mammals based on several lines of evidence, including fossil records, anatomical similarities, and genetic studies. Fossils of early cetaceans, such as Pakicetus and Ambulocetus, show transitional features between land-dwelling mammals and modern whales. Additionally, molecular analyses reveal genetic links between whales and terrestrial mammals, particularly artiodactyls (even-toed ungulates), supporting their evolutionary relationship. These findings collectively illustrate the evolutionary journey of whales from land to water.
What mammals do not live on land and do not lay eggs?
Marine mammals do not live on land, and no marine mammals lay eggs. Marine mammals include whales, dolphins and porpoises.
How does DNA evidence support whales evolutionary pathway?
DNA evidence supports whales' evolutionary pathway by revealing genetic similarities between whales and terrestrial mammals, particularly artiodactyls like hippos. Molecular studies show that whales share a common ancestor with these land-dwelling mammals, indicating a transition from land to water. The analysis of specific genes and DNA sequences has helped trace the evolutionary changes that enabled adaptations for aquatic life, such as modifications in limb structure and respiratory systems. Overall, genetic data provides a clear molecular framework that aligns with fossil evidence of whale evolution.
Did whales ever walk the earth?
Not as whales, no. Marine (sea) mammals (whales, dolphins, etc.) are descended from terrestrial (land) mammals, but they're not identical with those land mammals... among the more obvious changes, they've lost their legs. The related links section has a link to a Wikipedia page showing what some of the distant ancestors of whales might have looked like.
Do all mammal live on land?
Whales and dolphins are mammals and they live in the water so no, not all mammals live on land.
What evidence supports the hypothesis that whales evolved from land-dwelling mammals?
The evidence that supports the hypothesis that whales evolved from land-dwelling mammals includes the sinonyx. This is a wolf sized mammal that is believed to be a transition between the land animal and the ocean whale.
What is a mammals environment?
Land, sea (whales) and air (bats). Deserts, forests, tundra, mountain tops - you name it - mammals are there.
Were whales always sea mammals?
No. Bset science can tell mammals were first land living. And the creatures that eventually became whales for some reason opted for a more aquatic Lifestyle.
What part of a whale is evidence for evolution?
The evidence for evolution in whales can be seen in their skeletal structure, particularly in the remnants of hind leg bones found within the body. These vestigial bones indicate a shared evolutionary history with land-dwelling mammals and suggest that whales evolved from terrestrial ancestors.
What land mammal group is the beluga whale?
Beluga whales (Delphinapterus leucas) are aquatic mammals, not land mammals. They are cetaceans found in Arctic and Sub-Arctic waters.
