Ritualistic behaviors common to all members of a species are known as

• A. Instincts
• B. Fixed-action patterns elicited by sign stimuli
• C. Learned behaviors
• D. Reflexes

Answer: (B)

Ritualistic, species-wide behaviors are fixed-action patterns that run to completion once triggered by a sign stimulus. These are inherited, highly stereotyped sequences performed by all members of the species, not learned through experience. The sign stimulus is the specific cue in the environment that sets the pattern in motion, guiding the entire sequence from start to finish so it appears ritualistic.

That’s why this option fits best: it captures both the universal, innate nature of the behavior and the cue that elicits the organized sequence. Learned behaviors, by contrast, depend on experience and can vary between individuals, so they wouldn’t be universally performed in the same ritualized way. Reflexes are typically simpler, quicker responses to stimuli and don’t involve the extended, fixed sequence characteristic of a fixed-action pattern.