The side of the moon that faces the sun is always illuminated, but that side
does not always face earth. the different phases of the moon are caused by
the moon's near 28-day
answer here
submit

Ascientist wanted to formulate a pill to attack a specific type of bacteria that infects the throat. which biological component would be best to use as a model for the pill's function? bacteriocytes phagocytes complement antibodies