Science follows the evidence where it leads, and pseudoscience starts with the conclusion, and works backwards to confirm it
Explanation:
To swim, they move their tails up and down, rather than back and forth as fishes do. This is because whales evolved from walking land mammals whose backbones did not naturally bend side to side, but up and down. ... Whales do the same thing as they swim, showing their ancient terrestrial heritage.
Cetaceans are fully aquatic marine mammals belonging to the order Artiodactyla, and branched off from other artiodactyls around 50 mya (million years ago). Cetaceans are thought to have evolved during the Eocene or earlier, sharing a closest common ancestor with hippopotamuses.
The homology of animals is based on scientists current understanding on the evolutionary history of living species.
Answer:
The origin of the rock. The texture of the rock. The type of mineral in the rock.
