I believe it's D don't take my word for it.
Prophase 1, where crossing over occurs and DNA is already replicated
The nine activities that scientists engage in as a part of scientific inquiry are the following:
1. Observe
2. Define the problem
3. Form a study question
4. Research the problem
5. State the expectations (hypothesis)
6. Experiment and gather data
7. Analyze the results
8. Reflect on the findings
9. Communicate with the wider community
Lack of antibodies because thats the stuff to fight things away
The answer would be B) Nitrogen Trioxide
