057-2008

MO640 - Multiple-choice question

Consider the tree with branch lengths and its corresponding distance matrix below:



Regarding the following statements:

I. The value of X in the matrix is 2,5.
II. The value of Y in the matrix is 1,5.
III. The matrix is additive.
IV. The matrix is ultrametric.

Which alternative lists exactly the true statements?

1. I, II, III, IV.
2. I, III.
3. I, III, IV.
4. II, III, IV.
5. NDA

Original idea by: Fabio L. Usberti