Weight of persons working out in the gym random variable

What kinds of antigens are found on the rbcs of a person with a+ blood

All of these sentences include commonly confused homophones. which sentence is correct? you put too much sugar on your breakfast serial. my father grows vegetables and flours in his garden. will someone me untie the knot in my shoelace? when did the captain set sale on his trip to north america?

What is the meaning of the prefix un-? a. over b. above c. under d. not