TROPISM

• The turning of all or part of an organism in a particular
• direction in response to an external stimulus.

HELIOTROPISM

• Heliotropism is directed growth according to light.
• This is a picture of heliotropism from our field trip to LLELA.

GEO/GRAVITROPISM

• Geotropism is directed growth according to the influence of gravity.
• This is a picture of geotropism from our field trip when a tree was growing off a ledge.

PICK A LOOK

THIGMOTROPISM

• Thigmotropism is directed growth according to physical contact.
• This is a picture of thigmotropism from the field trip with vines growing around the tree
• (The caption got cut off.)

PHOTOTROPISM

• Phototropism is directed growth according to light and the color of light
• This is a picture from LLELA of flowers growing on a slope and growing toward the sun.

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