The esophagus, a tube that carries food to the stomach, is constantly being scraped as food travels through it. Why does the esophagus not deteriorate through a person’s lifetime? 1. Cells can anabolize the food prior to entering the esophagus.
2. Cells are constantly dividing and replacing old or damaged cells.
3. Cells promote a fluid to build up along the esophagus to reduce friction.
4. Cells build a type of protein called enzymes that act as an armor.

What is the relation ship between structure and function in an organism

The phylogenetic tree illustrates the relationship between humans and our closest living relatives. the tree was based on biochemical comparisons, including dna and amino acid sequences. according to the biomolecular data, we could infer that a) the four organisms do not have a common ancestor. b) humans are more closely related to chimps than any other apes. c) chimps are more closely related to gorillas than they are to humans. eliminate d) there is no evidence if any relationship between the four branches on the tree.

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