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In which pattern does the ridge flow resemble a spiral or concentric circles?

Radial loops flow toward which part of the hand?

How many deltas must a whorl pattern have at a minimum?

What is the purpose of typelines in fingerprint identification?

What are the three main types of fingerprint patterns?

What term is used when an appendage striking the recurve at a right angle spoils the loop?

1.      In a manipulative experiment, which variable is directly controlled by the researcher?

Observational studies are still valuable when manipulative studies are unethical or impractical. 

What is the definition of a paradigm shift in the context of fingerprint analysis?

How does studying history in forensic science help scientists?