Which of the Following Both Prevents Blood Loss and the Invasion

Question

Which of the following both prevents blood loss and the invasion of pathogens in vertebrates?
A)the formation of blood clots
B)phagocytosis
C)humoral immunity
D)cell-mediated immunity

Accepted Answer

The formation of blood clots not only prevents blood loss but also creates a physical barrier that prevents the invasion of pathogens. Phagocytosis and immune responses (both humoral and cell-mediated) are specific defense mechanisms that target and eliminate pathogens but do not directly prevent blood loss.