Fixed action patterns are described as which of the following?

Fixed action patterns are described as which of the following?

• A. Flexible and adaptable with experience
• B. Inflexible and executed to completion once started
• C. Entirely learned through practice
• D. Dependent on conscious choice

Answer: (B)

Fixed action patterns are instinctive, highly stereotyped sequences of behavior that are triggered by a specific sign stimulus and carried out to completion. Because they are innate and automatic, they are inflexible: once the sequence starts, it runs its course even if the triggering cue changes or disappears. This automatic, unmodulated nature is what defines a fixed action pattern. Context helps: these patterns are typically species-typical and not learned through practice, and they don’t require conscious decision. For example, certain instinctive feeding or mating responses proceed to completion regardless of subsequent changes in the environment. That’s why the best description is that they are inflexible and executed to completion once started. The other ideas—being flexible with experience, learned through practice, or dependent on conscious choice—do not fit how fixed action patterns operate.

Fixed action patterns are instinctive, highly stereotyped sequences of behavior that are triggered by a specific sign stimulus and carried out to completion. Because they are innate and automatic, they are inflexible: once the sequence starts, it runs its course even if the triggering cue changes or disappears. This automatic, unmodulated nature is what defines a fixed action pattern.

Context helps: these patterns are typically species-typical and not learned through practice, and they don’t require conscious decision. For example, certain instinctive feeding or mating responses proceed to completion regardless of subsequent changes in the environment.

That’s why the best description is that they are inflexible and executed to completion once started. The other ideas—being flexible with experience, learned through practice, or dependent on conscious choice—do not fit how fixed action patterns operate.