What should be the term for something thag allows some molecules to get through a membrane and keeps others out
insoluble permeability
soluble permeability
selective solubility
selective permeability

this protocol describes a detailed procedure for intracellular flow cytometry staining.

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 : )

looks like the answer is     c     to me!