14. Coordination and response
A section of Biology, 0610
Listing 10 of 622 questions
For Examiner's Use Seeds of the mung bean, Phaseolus aureus, were germinated and grown in a dish for a few days in the dark. The dish was then placed as shown in A. B shows the seedlings after a further two days in the dark. A B Name the response shown by the roots in . Suggest why the seedlings were kept in the dark during this investigation. Explain why it is important for their early growth that the roots and shoots of seedlings respond in the way shown in B. For Examiner's Use The response shown by the shoots in B is coordinated by auxins. Explain how auxins bring about this growth response in shoots. Weed seedlings are sprayed with synthetic auxins to kill them. Suggest how these weedkillers spread throughout the plant.
0610_w10_qp_31
THEORY
2010
Paper 3, Variant 1
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Questions Discovered
622