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Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.
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Which of the following statements accurately defines epidermis? a. a thick protein fiber composed of the protein collagen b. hard, dense bone tissue found on the outer surface of a bone c. single layer of epithelial cells and the underlying basal lamina d. outer, protective layer of the skin composed of stratified squamous keratinized epithelial tissue
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What is the function of the mitochondria...
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