These are the questions base on the article that I attached below. 1) What is the implication that there are no 'fixed sequence differences' between Bryoria fremontii and B. tortuosa? 2) Why is the ri

These are the questions base on the article that I attached below.

1) What is the implication that there are no 'fixed sequence differences' between Bryoria fremontii and B. tortuosa?

2) Why is the ribosomal DNA/RNA used or studied so often for fungi?

3) What does it mean for ‘majority of our lichen-derived sequences form a strongly supported monophyletic clade with Cyphobasidium”? What does this signify about the evolution of these the lichen-derived Basidiomycota fungi?

4) Explain the y-axis of Fig. 1C-F. What does 'logFC' stand for? What does each dot represent? And what does it mean to be above or below the zero line?

5) If Bryoria tortuosa and fremontii were genetically distinct, how should the colors on the tips of the trees be distributed in Fig. 1 a & b?