What factors determine the classification of biological materials?

• A. Color, size, and shape
• B. Cost, availability, and demand
• C. Pathogenicity, mode of transmission, and the impact on human health
• D. Origin, ecological impact, and legal status

Answer: (C)

The classification of biological materials is primarily determined by factors that relate to their potential impact on human health and how they interact with living organisms. Pathogenicity refers to the ability of an organism to cause disease, which is critical for understanding the risks associated with biological materials. The mode of transmission helps in identifying how an infection spreads, whether it be through direct contact, airborne particles, or vectors such as insects. The impact on human health is a pivotal factor since it assesses the severity and implications of exposure to these materials.

In contrast, aspects such as color, size, and shape are more related to physical characteristics and do not inherently define the biological risks or classifications. Cost, availability, and demand are economic factors that influence the market but do not play a role in the biological classification itself. Furthermore, origin, ecological impact, and legal status may be relevant in certain regulatory contexts but do not address the direct health-related implications that are foundational in classifying biological materials. Thus, the classification focuses on pathogenicity, transmission modes, and health impacts, making that answer the most appropriate.