SEM of a mutant fruit fly. Scanning Electron Micrograph (SEM) of the head of a mutant fruit fly (Drosophila melanogaster). This mutant has abnormal bar shaped eyes; they are smaller than normal and are due to the bar mutation. Fruit flies are widely used in genetic experiments, particularly in mutation experiments, because they reproduce rapidly and their genetic systems are well understood.

SEM of a mutant fruit fly. Scanning Electron Micrograph (SEM) of the head of a mutant fruit fly (Drosophila melanogaster). This mutant has abnormal bar shaped eyes; they are smaller than normal and are due to the bar mutation. Fruit flies are widely used in genetic experiments, particularly in mutation experiments, because they reproduce rapidly and their genetic systems are well understood.

This is a scanning electron microscope image of gunshot residue. This residue is deposited in the vicinity of a firearm being discharged. Analysis of the direction and amount will yield how far a firearm was from a victim when the gun was discharged. The criteria most commonly used in this determination is the presence or absence of gunshot residue, the pattern diameter, and the type and distribution of gunshot residue.

This is a scanning electron microscope image of gunshot residue. This residue is deposited in the vicinity of a firearm being discharged. Analysis of the direction and amount will yield how far a firearm was from a victim when the gun was discharged. The criteria most commonly used in this determination is the presence or absence of gunshot residue, the pattern diameter, and the type and distribution of gunshot residue.

This is a scanning electron microscope image of gunshot residue. This residue is deposited in the vicinity of a firearm being discharged. Analysis of the direction and amount will yield how far a firearm was from a victim when the gun was discharged. The criteria most commonly used in this determination is the presence or absence of gunshot residue, the pattern diameter, and the type and distribution of gunshot residue.

This is a scanning electron microscope image of gunshot residue. This residue is deposited in the vicinity of a firearm being discharged. Analysis of the direction and amount will yield how far a firearm was from a victim when the gun was discharged. The criteria most commonly used in this determination is the presence or absence of gunshot residue, the pattern diameter, and the type and distribution of gunshot residue.

This is a scanning electron microscope image of gunshot residue. This residue is deposited in the vicinity of a firearm being discharged. Analysis of the direction and amount will yield how far a firearm was from a victim when the gun was discharged. The criteria most commonly used in this determination is the presence or absence of gunshot residue, the pattern diameter, and the type and distribution of gunshot residue.

SEM of green algae filaments collected in a saltwater environment.

Woolly mammoth hair, (Mammuthus primigenius) This thick well insulated hair is from the extinct Woolly Mammoth. This species became extinct between 10,000 to 12,000 years ago. The magnification if 200x when printed 10 inches wide.

Woolly mammoth hair, (Mammuthus primigenius) This thick well insulated hair is from the extinct Woolly Mammoth. This species became extinct between 10,000 to 12,000 years ago. The magnification if 200x when printed 10 inches wide.

Optical microscope image of dyed sheep (wool) hair. The identification of different types of fibers is critical to investigating a crime scene. The magnification is 200 times when printed 10 inches wide.

Optical microscope image of sheep (wool) hair. The identification of different types of fibers is critical to investigating a crime scene. The magnification is 200 times when printed 10 inches wide.

Optical microscope image of red silk fibers in cloth. Silk is made from the fibers of the silk caterpillar (Bombyx mori) . The identification of different types of fibers is critical to investigating a crime scene. The magnification is 200 times when printed 10 inches wide.

Optical microscope image of red silk fibers in cloth. Silk is made from the fibers of the silk caterpillar (Bombyx mori) . The identification of different types of fibers is critical to investigating a crime scene. The magnification is 200 times when printed 10 inches wide.

Optical microscope image of silk fibers. Silk is made from the fibers of the silk caterpillar (Bombyx mori) . The identification of different types of fibers is critical to investigating a crime scene. The magnification is 200 times when printed 10 inches wide.

Optical microscope image of silk fibers. Silk is made from the fibers of the silk caterpillar (Bombyx mori) . The identification of different types of fibers is critical to investigating a crime scene. The magnification is 200 times when printed 10 inches wide.

Optical microscope image of silk fibers. Silk is made from the fibers of the silk caterpillar (Bombyx mori) . The identification of different types of fibers is critical to investigating a crime scene. The magnification is 200 times when printed 10 inches wide.

Optical microscope image of rayon fibers. Rayon is a manufactured regenerated cellulose fiber. Rayon is produced from naturally occurring polymers and therefore it is not a truly synthetic fiber, nor is it a natural fiber. It is known by the names viscose rayon and art silk in the textile industry. The identification of different types of fibers is critical to investigating a crime scene. The magnification is 200 times when printed 10 inches wide.

Optical microscope image of rayon fibers. Rayon is a manufactured regenerated cellulose fiber. Rayon is produced from naturally occurring polymers and therefore it is not a truly synthetic fiber, nor is it a natural fiber. It is known by the names viscose rayon and art silk in the textile industry. The identification of different types of fibers is critical to investigating a crime scene. The magnification is 200 times when printed 10 inches wide.

Fruit fly. Optical Micrograph of the head of a fruit fly (Drosophila melanogaster). Drosophila melanogaster has been used for many years in genetic studies because it is easy to manipulate in a laboratory. The magnification is 200 times when printed 10 inches wide.