The nervous system 3 Plant hormones 3.0 / 5 based on 1 rating ? BiologyAll LevelsAll boards Created by: Sophia HartCreated on: 18-04-13 15:09 What is the name of the plant hormone which controls phototropism and gravitropism? The name of the plant hormone which controls phototropism and gravitropism is auxin 1 of 11 Why are the responces of shoots and roots so important in the life of plants? Without the responces of shoots and roots the plant would not be able to get light or water for photosynthesis this would end in the plant dying 2 of 11 What are plant responces called? Plant responces are called tropisms 3 of 11 What are the 2 main types of tropisms? positive tropism – the plant grows towards the stimulus and negative tropism – the plant grows away from the stimulus 4 of 11 What is the stimulus in phototropism? Light is the stimulus in phototropism 5 of 11 What is the stimulus in gravitropism? Gravity is the stimulus in gravitropism 6 of 11 What is a tropism? A tropism is a growth in response to a stimulus 7 of 11 What is an Auxin? An auxin is a plant hormone produced in the stem tips and roots, which controls the direction of growth 8 of 11 What do the Auxins in the shoots of plants make cells do? Auxins make cells in shoots grow more 9 of 11 What do the Auxins in the roots of plants make cells do? Auxins make cells in roots grow less 10 of 11 Give one example of something plant hormones are used in? Plant hormones are used in weed killers 11 of 11
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