The Miller-Urey experiment showed:
a) life could be generated in their apparatus after one week.
b) the essential biological molecules associated with living organisms could be generated in an "abiotic" environment.
c) the essential biological molecules associated with life cannot be generated in an "abiotic" environment.
d) conditions in the "primitive Earth environment" could have generated complex molecules.

D. They used simple molecules from early times and put them in a simulation from that time and it made complex ones that we have now.

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.

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 : )