Question
What does the photograph show?
A. The polymerase chain reaction
B. A biostimulation reaction
C. The topography of a land area
D. The banding pattern on a stained gel
![Question What does the photograph show A The polymerase chain reaction B A biostimulation reaction C The topography of a land area D The banding pattern on a st class=](https://us-static.z-dn.net/files/dca/297ca44b1aa09af90c146868c6ab8031.png)