A genetically programmed bit of behavior that occurs when circumstances are appropriate and that require no learning is called:

A) habit
B) instinct
C) imprinting
D) inhabitation

An instinct is a genetically programmed behavior that occurs without the need for learning or experience. Habits are learned behaviors that are often repeated, but not necessarily genetically programmed. Imprinting is a type of learning that occurs during a critical period in an animal's life, and involves the formation of a social attachment to a particular stimulus. Inhabitation is not a recognized term in the context of animal behavior.