CK-12 Foundation
Ck 12: Life Science: 7.13 Tropisms
Learn how plants respond to different environmental stimuli.
CK-12 Foundation
Ck 12: Life Science: Tropisms
[Free Registration/Login may be required to access all resource tools.] Plants may not be able to move, but they are able to change how they grow in response to their environment. Growth toward or away from a stimulus is known as a...
BBC
Bbc: Gcse Bitesize: Plant Hormones
Plants produce hormones and respond to external stimuli, growing towards sources of water and light, which they need to survive. Read about tropisms and auxins that are used to control growth in plants. There is a quiz at the end.
CK-12 Foundation
Ck 12: Biology: Plant Responses
[Free Registration/Login may be required to access all resource tools.] Describes ways that plants respond to environmental stimuli.
Curated OER
Kenyon College: Thigmotropism in Tendrils
What is thigmotropism? Do plants have a sense of touch? What causes plants to curve toward the stimulus? Animated illustrations help to provide these answers and more. Hint: highlighting the text makes it easier to read.
McGraw Hill
Mhhe: Plant Growth and Growth Regulators
A very good overview of the hormonal control of plant responses to different environmental cues. Good place to start research.