Which of the following components of the immune system form memory cells after you receive a vaccine?

skin and saliva
monocytes and macrophages
neutrophils and histamines
b and t cells

B and T cells.

Explanation:

B cells and T cells are cells of adaptive immune system, which shows specificity, memory, and diversity against pathogens. When a particular antigen enters to the body, it triggers immune responses that activate naive B cells and T cells.

During activation, these cells divide to form 'effector B and T cells' that provide immediate responses against that antigen, and 'memory B and T cells' that provide response against that particular antigen during next or subsequent infections.  

Thus, the correct answer is option). B and T cells.

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles