Which characteristics do all bacteria and archaea have in common?
A.
prokaryotic and mulitcellular
B.
eukaryotic and multicellular
C.
prokaryotic and unicellular
D.
eukaryotic and unicellular

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.

Stem cells found adult tissue such as in bone marrow brain muscle skin and liver are only capable of what

True or false most plants are c3 plants, because they use molecules of carbohydrate known as g3p in their photosynthesis process.