biology 0.0 / 5 ? BiologyEvolution, extinction and natural selectionGCSEAQA Created by: Lewys ThomsonCreated on: 03-06-15 10:06 What are the three things plants are sensitive to? Light, moisture (water) and gravity. 1 of 7 What is the main plant hormone? Auxin. 2 of 7 What is the difference between auxin in the root of a plant and in the shoot of the plant? In the roots any auxin inhibits growth and in the shoot any auxin premotes growth. 3 of 7 What is a tropism? Tropism is a growth response to a stimulus. 4 of 7 What are the three types of tropism in a plant? Geotropism (gravirty), Phototropism (light), hydrotropism (water). 5 of 7 What does it mean if there is a negative tropsim? The plant is growing away from the stimulus. 6 of 7 Where are plant hormones used in agriculture? Fruit ripening, routing powder, weed killers. 7 of 7
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