Sensory processes are responsible for converting sensory messages into neural impulses
Nut is to shell as pea is to pod
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F. The sequence of an animals' DNA is how scientist classify modern animals
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The fish did not yet exist when the old layers of rocks were deposited. In fact, animals with hard parts did not evolve until about 600 million years ago, which is only about 13% of the 4.5 billion year age of the Earth. Multicellular animals without hard parts left tracks in older sediments, but had no fossilize-able body parts.
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