Tutorial
iGCSE Biology: Learn Tropic Responses in Plants
Learn about tropic responses in plants for iGCSE Biology, including phototropism, gravitropism, and the role of auxin in cell elongation and bending.
Tutorial
iGCSE Biology: Learn Tropic Responses in Plants
Learn about tropic responses in plants for iGCSE Biology, including phototropism, gravitropism, and the role of auxin in cell elongation and bending.
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Deck Contents
33 CardsLesson#1
Plants might seem still, but they are constantly responding to their environment. One way they do this is by changing their direction of growth in response to a stimulus. These directional growth responses are called tropisms.
Lesson#2
The first type of tropism you need to know is phototropism. 'Photo' means light, so phototropism is a plant's directional growth response to a light source.
Quiz#3
What is the term for a plant's directional growth response to light?
phototropism
Lesson#4
The second key tropism is gravitropism. As the name suggests, gravitropism is a plant's directional growth response to gravity.
Quiz#5
What is the term for a plant's directional growth response to gravity?
gravitropism
Lesson#6
Tropisms can be either 'positive' or 'negative'. A positive tropism is growth towards the stimulus, while a negative tropism is growth away from the stimulus.
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