During exposure to a foreign invader, there are more __________ present in the vertebrate body than before exposure
A. antibodies
B. lymphocytes
C. macrophages and antigens
D. all of these
Answer:D
During exposure to a foreign invader, there are more __________ present in the vertebrate body than before exposure
A. antibodies B. lymphocytes C. macrophages and antigens D. all of these