Locate an area that has been relatively undisturbed by human activity. There should be many fallen leaves, twigs and pieces of bark. Remember to have a partner with you at all times. â¢ Once you've found a suitable patch of leaf litter, measure out an area of one meter squared using the meter stick.n the areas with lots of human interference, human activity has contributed to a lower biodiversity. People might litter on the ground or simply step on animals. Other times, people may add chemical fertilizers and pesticides to the soil.
Accreditation Review Council on Education in Surgical Technology and Surgical Assisting. The ARC/STSA establishes, maintains, and promotes quality standards for education programs in surgical technology and surgical first assisting.
What is PSA? PSA is one of three major factors that are considered when evaluating a manâs particular case of prostate cancer. PSA stands for Prostate Specific Antigen. The word âspecificâ means that this enzyme is produced only by prostate cellsâwhether normal prostate cells or prostate cancer cells. No other cells (lung, intestine, liver, etc.) make PSA. The purpose of PSA is to keep semen (the white substance ejaculated during sexual intercourse) liquefied.