Use the Following to Answer Questions

question 20

Multiple Choice

Use the following to answer questions:
Place each of the milestones in an evolutionary context by matching the event with the appropriate time frame from those alternatives listed.
-toolmakers ___

• A)30,000 years ago
• B)15,000 years ago
• C)7000 years ago
• D)2 million years ago

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Definitions:

Chymotrypsin

Chymotrypsin is a digestive enzyme that breaks down proteins in the small intestine.

Peptide

A short chain of amino acids linked by peptide bonds, forming the building blocks of proteins.

Ninhydrin

A chemical reagent used to detect amino acids and proteins by producing a deep blue-violet color.

Histidine

An essential amino acid in humans, involved in the growth and repair of tissues and the production of histamine.