A foreign antigen has entered the body, which has elicited the immune response. A helper T cell binds to an antigen fragment on an antigen-presenting cell. What happens next?
A) B cells produce more antibodies.
B) A cytotoxic T cell destroys the antigen.
C) Free antibodies attach to the antigens.
D) A macrophage engulfs the target antigen.
Question 2
Meat replacements consumed by vegetarians are usually made of ____.
A) soy protein
B) fish protein
C) bean plus rice proteins
D) bean plus cheese proteins
Gas exchange across body surfaces.
An old concept of genetic transmission—a homunculus in a sperm cell.
Fuel lines are routed along the frame or body and secured with clips.
Cell Division
cell 2
A profile of the nuclear contents of a cell through the mitotic cell cycle