The correct answers on Plato are
excretory system
circulatory system
Answer:
Cellular respiration uses energy in glucose to make ATP. Aerobic (“oxygen-using”) respiration occurs in three stages: glycolysis, the Krebs cycle, and electron transport. ... This results in a net gain of two ATP molecules. Life first evolved in the absence of oxygen, and glycolysis does not require oxygen.
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If the organism has no natural predators then that organism can start to overpopulate the habitat and use up valuable resources that other organisms, who DO have natural predators, need to survive and repopulate.
