Question

a timeline of important discoveries about dna is shown below. these discoveries have contributed to our current knowledge about dna. which statement best summarizes the development of knowledge about dna over time? a past knowledge about dna was discarded as each new discovery was made. b ideas about dna have remained unchanged over time. c scientists gained more knowledge about dna as new evidence became available. d changes in ideas about dna are based on opinion.

Explanation:

• Option a: Incorrect. Past knowledge often builds the foundation for new discoveries, not discarded.
• Option b: Incorrect. The timeline shows continuous discovery and change in DNA knowledge.
• Option c: Correct. As new evidence (like different experiments and techniques) emerged over time, scientists' knowledge about DNA expanded.
• Option d: Incorrect. Scientific ideas about DNA are based on evidence, not just opinion.

Answer:

C. Scientists gained more knowledge about DNA as new evidence became available.