Final answer:
The random specimen is the most common form of urine specimen. It is analyzed through various methods, including visual observation, urine test strips, and microscopic examination, to detect abnormalities or infections.
Step-by-step explanation:
The most common form of urine specimen is the random specimen. In a routine urinalysis, a urine sample may be analyzed by sight and smell and with simple urine test strips.
If a particular disorder is suspected, urinalysis may be more extensive, with specific tests or viewing the urine under a microscope to identify abnormal substances. Additionally, a sample of urine may be cultured in the lab if a bacterial infection is suspected.