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➷ The correct answers would be:
phosphate molecule, nitrogenous base and deoxyribose sugar.
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In the stomach, food undergoes chemical and mechanical digestion. Peristaltic contractions (mechanical digestion) churn the bolus, which mixes with strong digestive juices that the stomach lining cells secrete (chemical digestion). As food travels from your mouth into your digestive system, it's broken down by digestive enzymes that turn it into smaller nutrients that your body can easily absorb. This breakdown is known as chemical digestion.
Explanation:
mollusks and arthopods............
Transports salt into the ocean.
