How do fingerprints typically leave marks on surfaces?
A. Through contact with blood
B. Through direct DNA transfer
C. Through sweat and oil secretions
D. Through shedding of skin cells
Answer:C
How do fingerprints typically leave marks on surfaces?
A. Through contact with blood B. Through direct DNA transfer C. Through sweat and oil secretions D. Through shedding of skin cells
Explanation: Fingerprints are left on surfaces through the transfer of sweat and oil secretions from the friction ridge skin. These secretions contain the unique ridge patterns that form the fingerprint.