Energy is produced in the cores of main sequence stars when? A) lighter elements undergo fusion into heavier elements

B) heavier elements undergo fusion into lighter elements

C) cosmic background radiation is absorbed

D) cosmic background radiation is released

In "the pig," what is the main effect that the piglet initially has on kibuka?

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.

What tool do geneticists use to predict the outcome of genetic crosses? a.karyotype b.punnett square c.centrifuge