Independent adult European hedgehogs, Erinaceus europaeus, have body lengths ranging from 20 cm to 30 cm.
Which of the following describes this variation in body length among European hedgehogs?
Interspecific and controlled by environmental factors only
Intraspecific and controlled by both genetic and environmental factors
Intraspecific and controlled by genetic factors only
Interspecific and polygenic
24 exam-style questions on OCR A A Level Biology Biodiversity. Each one has a worked solution and a mark scheme showing where the marks go.