The answer is D: test possible choices and then avoid ones that are not desirable.
I think A but you should double check with some one else.
The answer to this question might be protein.
Sexual Reproduction. Meiosis can be pronounced (MIosis) but for the purposes of not getting it confuses me Mitosis, I pronounce it (MEosis), and the way I remember it is, (MEosis) is use for sexual REprodection, to make gamETES. Hope it helped! :)
Instrinsic factor is the stomach secretion necessary for normal hemoglobin production in RBCs.
