Considerando la explicaciones que propone Darwin en la teoría de la evolución argumenta en en un thrash de la información los las especies son IMU inmutables no cambian su característica característica con el tiempo cállate se te

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Because ATP is not produce yet.

Explanation:

The cycle is not considered as complete because the main product i. e. adenine tri phosphate (ATP) is not produced yet. The main product of cellular respiration is the production of energy in the form of ATP with the help of oxygen whereas water and carbondioxide are the byproduct as well as waste material which can be removed with the help of breathing so that's why the cycle is considered as incomplete.