Prokaryotic cells because they don't have a nuclei.
Answer:
peptide antigens by MHC class II molecules
Explanation:
Helper T cells are activated by peptide antigens by MHC class II molecules. These antigens express on the surface of antigen-presenting cells (APCs). After activation, the T helper cells divide and secrete cytokines to assist the immune response.
C.
Falsifiable is the adjective form of the verb "falsify," which in science means "prove (a statement or theory) to be false."
