Acell with 2cm side has what surface area?

since a cell has 6 sides :

       L= length, W= width

surface area = ( L x W ) X 6

                     = (2 X2 )  X 6

                     = 4 X 6

                     = 24 cm²

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )