Select all the correct answers. Evolution never occurs in a straight line. There are always branches and nodes that can be seen along the way. Based on the image, which two statements are true?

All organisms have had one common ancestor in the past.
Chimpanzees are more evolved than all other organisms.
Gorillas share an extinct ancestor with bonobos.
Chimpanzees are unrelated to orangutans or humans.
Orangutans are unrelated to gorillas or bonobos.

Imagine a self-reactive t cell that has not undergone clonal deletion in the thymus (that is to say, it has escaped central tolerance). if it encounters self antigen in the absence of an infection or inflammation, what will happen to this self-reactive t cell? (select two answers) (a) the t cell undergoes clonal expansion. (b) the t cell gains effector functions. (c) the t cell undergoes apoptosis. (d) the t cell becomes activated. (e) the t cell becomes anergic.