A botanical garden uses tissue culture to produce begonia plants. Culture P and culture Q each contain the same number and size of small pieces of shoot tissue in identical growth media. Auxin is added to culture P but not to culture Q. Both cultures are kept under the same conditions for four weeks.
Compared with culture P, which statement describes the expected effect of leaving auxin out of culture Q?
Less new tissue forms because cell growth and division are reduced
More new tissue forms because auxin normally slows cell elongation
New shoots grow towards gravity instead of growing away from it
New shoots begin flowering earlier while they are in the culture
87 exam-style questions on AQA GCSE Biology 5.4 Plant hormones, covering 5.4.1 Control and coordination and 5.4.2 Use of plant hormones (HT only). Each one has a worked solution and a mark scheme showing where the marks go.