A timeline of important discoveries about DNA is shown below. These discoveries have contributed to our current knowledge about DNA.

Question

Image

Which statement best summarizes the development of knowledge about DNA over time?

a
Ideas about DNA have remained unchanged over time.
b
Changes in ideas about DNA are based on opinion.
c
Past knowledge about DNA was discarded as each new discovery was made.
d
Scientists gained more knowledge about DNA as new evidence became available.

Answer 1

The statement that best summarizes the development of knowledge about DNA over time is:

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