What are the experiments of using isotope markers in high school biology?

Rubin and Carmen proved that the oxygen produced by photosynthesis comes from water.

2. Calvin traced the trace of carbon in photosynthesis and learned about the complex chemical reactions in photosynthesis.

3. The T2 phage labeled by hershey and Chase proved that DNA is genetic material.

4. Michielsen and Starr labeled DNA, which proved that the replication mode of DNA was semi-conservative.