REVISION NOTES

IGCSE Edexcel Biology

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2.14 Coordination and Response (in Plants)

2.14.1 Understand how organisms are able to respond to changes in their environment

2.14.2 Understand that homeostasis is the maintenance of a constant internal environment, and that body water content and body temperature are both examples of homeostasis

2.14.3 Understand that a co-ordinated response requires a stimulus, a receptor and an effector

2.14.4 Understand that plants respond to stimuli

2.14.5 Describe the geotropic and phototropic responses of roots and stems

edexcel_igcse_biology_topic016_coordination-and-response-in-plants_002 _geotropism

2.14.6 Understand the role of auxin in the phototropic response of stems

edexcel_igcse_biology_topic016_coordination-and-response-in-plants_004_auxins-in-phototropisim