Anything that causes a living thing to react is a/an_.

• behavior
• instinct
• stimulus
• response

The way that a living thing acts or responds to its environment is its_.

• behavior
• stimulus
• instinct
• response

Everything that surrounds and affects a living thing is a/an_.

• inherited behavior
• internal stimulus
• external stimulus
• environment

Anything within an organism's body that causes it to react is a/an_.

• external stimulus
• internal stimulus
• behavior
• response

A complex pattern of inherited behavior such as geese migrating is a/an _.

• instinct
• stimulus
• behavior
• learned behavior

A reflex is an example of _, which an organism is born with.

• learned behavior
• response
• inherited behavior
• instinct

Something in a living thing's environment that causes it to react is a/an_.

• external stimulus
• internal stimulus
• stimulus
• inherited behavior

A behavior that a living thing is taught or acquires from experience is a/an_.

• stimulus
• environment
• learned behavior
• response

The reaction of a living thing to a stimulus is a/an_.

• behavior
• instinct
• internal stimulus
• response

After hearing a loud sound, you cover your ears. The sound is a/an _.

• learned behavior
• inherited behavior
• external stimulus
• internal stimulus