How are atoms held together in molecules? A. They combine to form polymers
B. They form covalent bonds
C. They break hydrogen bonds
D. they form ions

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