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he vertebrate stomach as an example of an organ composed of all four tissue types
Blue whale skeleton, outside the Long Marine Laboratory at the University of California, Santa Cruz
Size comparison of Earth and Mars.
Bones change radically in size and shape from newborn to adult, as these cervical vertebrae demonstr
Glacial deposits overlain by marine carbonates formed in very warm water
Beak size in finches during dry years increases because of strong selection