During cellular respiration, the covalent bonds of a molecule are broken down to form products. Which molecule is broken down? O water
O carbon dioxide
sugar
O ADP

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