At the end of the esophagus is a thick ring of a muscle called a sphincter which allows food to enter the stomach but not from the stomach back into the esophagus. Once the food enters the stomach it is mixed with the digestive juices.
Answer: both amino acids
Explanation: amino acids will have the same basic structure at physiological pH levels.
Explanation:
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photosynthesis eats carbon dioide cellaur doesnt
