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.
Charles Darwin noticed that among the same species there were variations in traits based upon geographical location. These changes may have evolved from climate differences, predator/prey relationships and food sources. This particular experiment was intended to duplicate natural selection by demonstrating the concepts with artificial selection. The result was that over time, new traits could be bred for. Although there may be more than one correct answer here, the best answer is the first; desirable traits can be selected and bred in offspring.
10kg mass and a 10kg mass at 10km apart
They add nitrogen to the soul through their nodules !
Answer:
Option A. Steak, is the correct answer.
Explanation:
Steak is the food substance that contains the material which is needed to build muscles in the human body , but does not contain the macromolecules that provides quick energy. Steak is a type of meat which is a good source of protein and protein is the main nutrient which is responsible for the building of muscles in the human body.
