What are the three possible combinations of the two types of proteins that can be found on a person's red blood cells?

Brainliesttt me asap! the below reaction can be categorized as more than one type of reaction. which reactions are these, and what are the types of reactions?

If many scientists conduct the same or similar experiments, and all obtain similar results, a can be written, which is a generally agreed-upon statement that explains and predicts how a natural phenomenon works.

The point along a planet's orbit where it is closest to the sun is called the