Muscle cells in athletes often have more mitochondria than muscles cells in non athletes based on the observation it can be inferred that the muscle cell in athletes

i am going to guess that it is co2.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.