Which of the following is true about a phylogenetic tree ? A) they're a way of visualizing how different species are related. B) Branch length always corresponds to how long a species has been alive. C) The species to the right are more evolved than the species to the left. D) All of the above.

b is the correct answer

bacteria could be both, harmful and to us. harmful bacteria could make us sick and probably even by getting the chances of getting a disease, but good bacteria fight it off with your immune system. there is always bacteria everywhere we go. we need to make sure to wash our hands after using the restroom, before eating, after eating, after petting an animal too. so you see, bacteria is everywhere and is harmful or . i hope this . : ) : ) : )