Answer:
Genes go brrrrrrrr
Explanation:
The answer is C because gene therapy is used to knock out, replace, or remove the mutated genes.
A nervous system because worms don't have nerves
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.