Which of the following is NOT a type of biological evidence?

Soil is not considered a type of biological evidence. Biological evidence typically refers to materials that originate from living organisms, which include things like seminal fluid, hair, and tissue (such as skin cells). These materials contain DNA or other biological markers that can be used for identification purposes in forensic science.

In contrast, soil is comprised of minerals, organic materials, and other non-biological components. While it can sometimes contain biological elements (like pollen or microorganisms), it is primarily classified as an environmental or physical type of evidence rather than biological. This distinction is significant in forensic investigations, where the classification of evidence types can impact the collection, analysis, and interpretation of evidence.