Which part of a scientist argument must be supported by valid data
a. claim
b. evidence
c. reasoning
d. theory

Which is an example of a decomposer? a. bear b.algae c.grass d.bacteria d bacteria

Pulmonary arteries carry highly oxygenated blood. true or false?

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.