OCR GCSE Biology A · J247
Specification B6.1a · Paper 2 (Foundation), Paper 4 (Higher)
Revise: Field investigationSmall invertebrates can be collected with a pooter, which draws them into a chamber while a filter protects the user, or with a net, such as a sweep net used through vegetation. Use a consistent collection method at each sampling point. An identification key helps distinguish species by a series of observable features, so the correct animals are counted.