Question

5. true / false Once an evolutionary tree is established, it can never be changed.

Answer 1

False, organisms can change

Answer 2

False.

Step-by-step explanation:

I Googled it, and it says otherwise to that statement. Here's what Google says.

A phylogenetic tree may change for example if new species are found, and have to be included, or if new evidence shows that the species already 'in the tree' are related differently from that shown.

Hope I helped!