Diaphragms O must be removed within two hours following intercourse.
O have a low effectiveness rate.
O create a physical and chemical barrier to sperm.
O can be purchased without a prescription.

scientists have discovered that hiv does not cause aids by the virus's direct effect on the host's immune cells, but rather through the cells' lethal influence on one another. researchers from the gladstone institutes have revealed that hiv does not cause aids by the virus's

but there is no

i guess you forgot putting it.

c is the correct answer hope this !

1. what is the relationship between the shape of an enzyme and the reactions they catalyze?

2. how does an enzyme inhibitor work?

separate your answers so i dont get confused : )