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animals that are warm-blooded; have hair, mammary glands, and a four-chambered heart; and breathe by means of lungs
method of movement in which a snake alternately stretches and shortens segments of its body
false theory that a human embryo goes through stages of development resembling man's "evolution"
false hypothesis that the earth and all organisms that inhabit it make up one living thing
branched pigment cells that control skin coloration of amphibians, reptiles, and fish
the process by which microorganisms break down cellulose in the stomachs of artiodactyls
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