Which of the following is an example of hybridization?

a. Special enzymes are used to break DNA strands at certain locations.

b. Levi crosses a horse with a donkey to create a mule. The mule is stronger than both of its parents.

c. The genes from a two monkeys are combined and injected into a bacterium.

d. Tracy will only cross seedless fruit trees. Over time, her entire orchard is made of seedless fruit trees.

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.