Fingerprints+chapter+(multi.choice+and+short+answer)LR

**fingerprint's:**
multi choice: 11.c 12.A 13.A 14.c 15.D

16. Another way to distinguish one fingerprint from another is a ridge count. An imaginary line is drawn from the center of the core to the edge of the delta. 17. Fingerprint: Fingers are covered with small ridges. Those are raised portions of the skin. They help us with a grip on objects. When the ridges press against things, they leave a mark, an impression called fingerprint. 18. Fingerprints are formed at the 10th week of pregnancy. The creation of fingerprints happens in the basal layer. In the fetus, this layer grows faster than the epidermis. The layer collapses and folds in different directions. 19. The layer cannot be altered or destroyed permanently by skin injuries becuase the outer layer protects us. 20. a. Ninhydrin: Amnio acids found in sweat b. cyanoclcrylate: Reacts with amino acids c. Silver nitrate: chloride from salt in perspiration on the print combines with silver nitrate to form silver chloride d. iodine fuming: iodine combines with carbohydrates in latent print.