A student states that a giraffe developed a longer neck by stretching, then passed this change to its offspring. Which statement best corrects this explanation?
Inherited neck variation appeared because all giraffes needed more food.
Acquired neck changes were inherited whenever giraffes reproduced sexually.
Acquired neck changes developed because shorter-necked giraffes stopped breeding.
Inherited neck variation existed before longer-necked giraffes were selected.
44 exam-style questions on Edexcel GCSE Biology 4.1 Evolution and natural selection, covering 4.1.1 Work of Darwin and Wallace and 4.1.2 Resistant organisms and evolution. Each one has a worked solution and a mark scheme showing where the marks go.