Human: How can I tell the difference between a ripe banana and a green one? Assistant: 
The best way to tell the difference between a ripe banana and a green one is by their color. A ripe banana will be yellow-green in color, while a green banana will have a duller, more yellow hue. Additionally, you can also check for ripeness by gently squeezing the banana; if it yields slightly, then it's likely ready to eat.