A researcher grows young pea shoots vertically in darkness. A narrow beam of light is directed from the left onto only the tip of each shoot. The growing region immediately below each tip remains in darkness. The researcher compares cell elongation on the left and right sides of this growing region.
Which result would show the expected response to light detected at the shoot tip?
cells on the right side elongate more than cells on the left side
cells on neither side elongate during the investigation
cells on the left and right sides elongate by the same amount
cells on the left side elongate more than cells on the right side
105 exam-style questions on Edexcel GCSE Biology 6.3 Plant hormones, covering 6.3.1 Plant hormones and tropisms and 6.3.2 Commercial uses of plant hormones. Each one has a worked solution and a mark scheme showing where the marks go.