a universal donor a; has only antigen A in her red blood cells b;lacks antigens in red blood cells c;has both antigens and antibodies in her blood d;lacks antibodies in her serum

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

When mendel crossed a true-breeding short plant with a true-breeding tall plant all the offspring were tall. which term describes the gene for tallnes?

What element is able to combine with itself and hydrogen to form large molecules ?