What is considered biological evidence?

What is considered biological evidence?

• A. Clothing and fibers
• B. Blood, semen, saliva, and hair
• C. Photos and sketches of the crime scene
• D. Witness accounts and statements

Answer: (B)

Biological evidence is defined as any material that can be scientifically analyzed and is derived from a living organism. In this context, blood, semen, saliva, and hair are all biological substances produced by living beings, making them highly relevant in investigations for DNA analysis and other forensic testing. This type of evidence is critical, as it can provide direct links to suspects or victims through genetic markers. Clothing and fibers, while they can provide valuable forensic information, are classified as trace evidence rather than biological evidence. Photos and sketches serve as documentation of the crime scene but do not constitute biological material. Witness accounts and statements are considered testimonial evidence, which is important for establishing facts but does not involve physical evidence derived from biological sources. Consequently, the correct identification of biological evidence as the substance that can yield DNA and other crucial forensic analysis makes this choice definitive.

Biological evidence is defined as any material that can be scientifically analyzed and is derived from a living organism. In this context, blood, semen, saliva, and hair are all biological substances produced by living beings, making them highly relevant in investigations for DNA analysis and other forensic testing. This type of evidence is critical, as it can provide direct links to suspects or victims through genetic markers.

Clothing and fibers, while they can provide valuable forensic information, are classified as trace evidence rather than biological evidence. Photos and sketches serve as documentation of the crime scene but do not constitute biological material. Witness accounts and statements are considered testimonial evidence, which is important for establishing facts but does not involve physical evidence derived from biological sources. Consequently, the correct identification of biological evidence as the substance that can yield DNA and other crucial forensic analysis makes this choice definitive.