LS FAC Tropism

 A change in the environment that an organism can detect or sense

• Stimulus
• Feedback
• Reaction
• Response

The way an organism reacts or changes when it senses a stimulus

• Response
• Adaptation
• Behavior
• Reaction

Something from outside the organism that causes a response

• Response
• Reaction
• Internal Stimulus

• External Stimulus

Something happening inside the organism that causes a response

• External stimulus
• Internal stimulus
• Environmental factor
• Genetic mutation

The way a living thing turns or grows in response to something in its environment

• migration
• photosynthesis
• tropism
• hibernation

When an organism moves or grows toward something

• Positive tropism
• Random movement
• Neutral tropism
• Negative tropism

When an organism moves or grows away from something

• Positive tropism
• Negative tropism
• Phototropism
• Geotropism

 How plants respond to gravity

• Geotropism

• Hydrotropism

• Thigmotropism

• Phototropism

 How plants respond to light

• Geotropism

• Hydrotropism

• Thigmotropism

• Phototropism

 How plants respond to touch

• Geotropism

• Hydrotropism

• Thigmotropism

• Phototropism