The answer should be oxygen
Answer:
The answer to your question is <u>All of the above</u>
Explanation:
Science is observable, testable, and flexible. This is shown when doing an experiment. First you observe something, test, then record. When new information or evidence comes in, Science is flexible enough to allow changes to the topic's existing evidence or add on to it.
Answer:
Uracil
Explanation:
DNA only uses Thymine so that leaves Uracil for RNA because all of the other bases are used for both.
<span>
a. radioactive isotopes. They use radioactive Phosphorus-32 as labels on a phage (bacteriophage) DNA that infects E. coli. Their experiment showed that the radioactive isotopes were only seen in E.coli and not in the phage.</span>
