The flying insects classically utilize high numbers of mitochondria in flight muscles. In addition, mitochondria are organelles within eukaryotic cells that yield adenosine triphosphate in which the foremost energy molecule used by the cell. For this reason, the mitochondrion is sometimes denoted to as the powerhouse of the cell. The mitochondria are originating in all eukaryotes which are all living things that are not bacteria or archaea. It is thought that mitochondria ascended from once free-living bacteria that were combined into cells.
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I want to say it is the middle layer. But not 100% sure. Sorry if its wrong.
if you told me what process i could help you - post a new question and ill try to help you
Polar bears, arctic wolves, snowy owl and a lot more