Your patient eats a very balanced diet. They are very weak, low on energy and they are losing weight. You test their pancreas and notice that it is producing
the correct amounts of digestive enzymes. Explain what is wrong with your
patient's digestive system.

many phylogenetic trees have a single lineage at the base representing a common ancestor. a lineage that evolved early from the root and remains unbranched is called basal taxon. when two lineages stem from the same branch point, they are called sister taxa.

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explanation:

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.