Final answer:
Cell type 1 is likely to be a myocyte due to its larger number of mitochondria, larger size, and more extensive cristae.
Step-by-step explanation:
The cell type that is likely to be Cell type 1 is the myocyte. Myocytes are muscle cells that require a high amount of energy to function properly, which is why they have a larger number of mitochondria compared to other cell types. The larger size and the presence of extensive cristae in the mitochondria of Cell type 1 further indicate its higher energy demands.