The pinewoods of texas is wettest ecoregion in the state. there is little weathering and erosion because of the dense stands of
pointers found here. the decomposition of the plant materials develop rich soil in this area. interference in the ecoregion
can increase the erosion that occurs. what is one source of increased erosion in the pineywoods?
a)
deforestation by human.
excessive precipitation
grazing by herds of bison
d)
an increase burrowing animals.

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.