14. unlike t lymphocytes, b lymphocytes unlike t lymphocytes, b lymphocytes
a. are white blood cells.
b. recognize infected body cells.
c. are made in the red bone marrow.
d. discover antigens in body fluids

Unlike T lymphocytes, B lymphocytes D.) DISCOVER ANTIGENS IN BODY FLUIDS.

B lymphocytes cannot directly attack infected cells. Instead, they produce antibodies that discovers and hijacks the antigens in body fluids like blood. 

Because without physical activity, the body has extra "energy" if you will, and so when it is time for bed you are not tired, so you end up staying up all night. also there is probably an effect on your internal clock, which messes with your melatonin production which goes hand in hand with your sleep cycle

Number one is kayaking number two is communication skills