(5) describe how the nucleus, the chloroplast, and the mitochondrion
may have become a part of the eukaryotic cell.

answer:

mitochondria are the "powerhouses" of the cell, breaking down fuel molecules and capturing energy in cellular respiration.

chloroplasts are found in plants and algae. they're responsible for capturing light energy to make sugars in photosynthesis.

mitochondria and chloroplasts likely began as bacteria that were engulfed by larger cells (the endosymbiont theory).

explanation:

on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.