Answer:
Oxygen and pyruvate.
Explanation:
The krebs cycle is a stage of cellular respiration and occurs in aerobic organisms. In this case, we can say that the Krebs Cycle only occurs in the presence of oxygen, being essential for the completion of cell respiration.
The Krebs cycle only occurs after the completion of glycolysis, as it needs to be initiated by pyruvate, which is a molecule resulting from glycolysis. In this case, in addition to oxygen, the presence of pyruvate is essential for the krebs cycle to occur.
In the Atlantic Ocean / or Ocean
A) One species always outcompetes the other until only one species remains.
To check your answer at least twice
I filled in each labeled square for you and wrote each percentage to the right of each square with the genotype of the last two.
