Identifying organisms can be challenging, particularly when there could be hundreds of different species within any one sample. Scientists use paired-statement keys to make it easier to identify organisms that are sampled.
Paired-statement keys are set out as a list and you simply start at number one on the list and work your way through until you reach the name of the organism.
Below is a simple paired statement key for garden invertebrates. Pick one of the organisms and work your way through the flow chart to identify it.