When travelling the westcoast of South America with my father, I watched bananas being loaded onto our cargo ship and heard stories about workers being bitten by nasty spiders or other hazardous insects. Now bananas are grown in perforated plastic bags, keeping insects out. Each tree shows the life span:Dead old tree on right, new adult in centre, teenaged tree on left. Each new shoot produces one bunch up to 3 feet long. A flower grows into an early bunch. See below:
As the flower petals die off, the baby bananas are revealed and curl around the inner stem.