OCR GCSE Biology B · J257
Paper 1 (Foundation), Paper 2 (Foundation), Paper 3 (Higher), Paper 4 (Higher)
Revise: Developing ExplanationsScientific methods also change when technology makes new observations possible. Scientists have long compared organisms’ physical features to investigate evolutionary relationships. Similar appearances can be misleading, however: wings used for flight do not necessarily show that two organisms are closely related.