A fresh water standing body of water such as a lake, pond, or inland wetland is generally classified as what type of system

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.

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.

answer; aerobic conditions; citric acid cycle (krebs cycle) electron transport chain;         anaerobic conditions; fermentation; both glycolysis;