Scientists cut the tip from every leaf on a group of mature bean plants. Seeds produced by these plants were collected and grown. No leaves were cut on the offspring plants.
All the offspring developed leaves with complete tips.
Which statement explains how these results provide evidence against Lamarck's idea?
If shortened leaves were inherited, uncut offspring would also develop shortened leaves
Cutting changed the parents' alleles for leaf shape, but these alleles were not passed into the seeds
Lamarck's idea predicts complete leaf tips in the offspring, because cut leaves are a feature gained during life
Plants with shortened leaves made fewer seeds, so natural selection removed this feature from the offspring
71 exam-style questions on AQA GCSE Biology 6.3 The development of understanding of genetics and evolution, covering 6.3.1 Theory of evolution, 6.3.2 Speciation, 6.3.3 The understanding of genetics, 6.3.4 Evidence for evolution, 6.3.5 Fossils, 6.3.6 Extinction, and 6.3.7 Resistant bacteria. Each one has a worked solution and a mark scheme showing where the marks go.