Unit 3 Vocabulary

A change in the environment outside of the organism

• Stimulus

• Internal stimulus

• External stimulus

• Turgor Pressure

A response within a system that influences the activity of that system

• Geotropism

• Turgor Pressure

• System

• Feedback mechanism

A push or pull that can change the position or motion of an object / material

• Movement

• Motion

• Move

• Force

Growth that happens in organisms in response to gravity, such as the downward growth of plant roots

• Gravity

• Geotropism

• Phototropism

• Movement

The body’s ability to keep the internal balance of the body stable

• Homeostasis

• Stable

• System

• Action

A change within the organism

• External Stimulus

• Internal stimulus

• Geotropism

• Force

A change in the position of an object

• Development

• Action

• Force

• Motion

Conducting tissue in plants that transports nutrients through the plant

• Tissue

• Organ

• Phloem

• Xylem

Growth that happens in organisms in response to light, such as a stem bending toward a light source

• Phototropism

• Geotropism

• Wilt

• Light

Below-ground part of a plant that includes the organs such as roots, tubers, and rhizomes

• Shoot System

• Root system

• Organ

• Organ System