Question

how did avery help build our understanding of genetics?
a. he showed that viruses do not contain dna.
b. he showed that traits cannot be inherited.
c. he showed that humans do not have dna.
d. he showed that dna is a transforming factor

Explanation:

Avery's key experiment demonstrated that DNA, not proteins or other molecules, is the substance that transfers genetic traits between bacteria, identifying it as the transforming factor. The other options are incorrect: viruses do contain DNA/RNA, traits are heritable, and humans do have DNA.

Answer:

D. He showed that DNA is a transforming factor