What conclusion about the bacteria domain could be made from the phlyogenetic tree below?

Which of the following is an example of this type of co-evolution

What is the problem in this article? what solution does the article propose?

What would most likely happen if a person increased the amount of saturated fat in his or her diet? the person's risk of cardiovascular disease would increase. the person's risk of cardiovascular disease would decrease. the person's bad cholesterol would decrease. the person’s good cholesterol would increase.