If only a single member of a pair of chromosomes is present in a cell, it is a condition and is most likely a cell.

b, acidosis

acidosis is when the human body attempts to return the bloods ph levels back to normal when the blood is acidic

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 : )