Why do sprinters breath heavily after a race? What is going on inside their muscle cells?

I cannot say ask their muscles

Sprint runners breathe heavily after a race because they rely on lactic acid fermentation as their primary source of energy. ... Consequently, lactic acid builds up in muscle cells as a result of lactic acid fermentation.

Explanation:

answer; i believe the correct answer is (sporophyte);

hi~~

i would say that hybridization occurs frequently in nature, because there are many types of hybrids that have occurred naturally, such as the mule (male donkey + female horse)