gcse biology question help

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Shush01241
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How would I get the full 3 marks on question 3.4?Name:  sfsd.PNG
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heldbygrace
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I can’t answer it for you, but think about a certain plant hormone. In explain questions, you need to use a ‘because’ or ‘which means’. It’s basically asking ‘what and why’. Hope this helps.
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Shush01241
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Can anyone give me a model answer?
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heldbygrace
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(Original post by Shush01241)
Can anyone give me a model answer?
I’m afraid that’s not allowed. Look through your book or revision guide, about plant hormones, (that’s as much as I can tell you) say what is happening and why. That should get you full marks. What’s making it bend and why
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epica213
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Here's my attempt:
Plants have growth hormones called auxins. When exposed to light, the auxins move to the opposite side of the stem to which the light is shining on. Because auxins cause elongation of cells, the darker side Q of the stem will elongate more than the lighter side P, which will cause the plant to grow towards the light. This is called positive phototropism

You probably want to mention auxins and tropisms here, and remember that auxins don't make new cells, they just elongate cells.
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