Concept:Discontinuous variation produces clear-cut, non-overlapping forms, and fingerprints are a unique physical feature used in forensic crime detection.
Explanation:Variation can be continuous or discontinuous.
Continuous variation shows a gradual range of intermediate values, such as height or weight.
Discontinuous variation has distinct categories without intermediates, such as blood groups or fingerprints.
Blood group and eye colour are discontinuous traits, but they are not the physical feature commonly used to match a criminal to a crime scene.
Fingerprints are morphological traits because they are visible physical structures on the fingers.
Fingerprints fall into distinct patterns, and every individual has a unique set of prints.
Even partial fingerprints recovered at a crime scene can be compared with a suspect’s fingerprints.
Therefore, fingerprints are the discontinuous morphological variation used in crime detection.
Answer:C. finger prints