In the first stage of cellular respiration (glycolysis), two molecules of pyruvate are produced. In the remaining stages of cellular respiration, a number of additional products are produced, such as . These other stages occur in the .

Explanation:

In the process of glycolysis, glucose molecule is enzymatically broke down into two pyruvate molecules, which occurs almost in all cells ( eukaryotes as well as prokaryotes). In case of eukaryotes, glycolysis occur in cytoplasm. In the process of glycolysis; Pyruvate, NADH and ATP are produced. After generation of pyruvate , pyrvate is converted into acetyl CoA,  which in the mitochondria is further used in energy production.

oceans

indian ocean

pacific ocean

atlantic ocean

arctic ocean

southern ocean

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.