Unit 3 Review: Biological Evidence and DNA

Front

What are the two classifications of fibers?

Back

Natural fibers and synthetic fibers.

Front

What test is used to distinguish between human and animal blood?

Back

Precipitin test.

Front

What is the outer layer of a hair called?

Back

Cuticle.

Front

What blood type is represented by the A antigen and the Rh factor?

Back

A+.

Front

What is the term for the emission of light from a chemical reaction?

Back

Chemiluminescence.

Front

What are natural fibers made from?

Back

Plant or animal sources.

Front

What are synthetic fibers made from?

Back

Chemical processes, typically petroleum-based.

Front

What is the significance of the cuticle in hair analysis?

Back

It protects the hair shaft and can provide information about the hair's origin.

Front

How can blood type be determined from a sample?

Back

By using specific antibodies that react with the antigens present on the red blood cells.

Front

What is the principle behind the precipitin test?

Back

It relies on the reaction between antibodies and antigens to identify the source of blood.