Instead of the defining life science has decided
-describe the characteristics of life
-not differentiate between living and nonliving.
-qualify living things as things that can move.
-qualify living things as high complex

the answer is:

carbon dioxide

a- multicellular

b-eukaryotic

c-no cell wall

d-heterotrophic

e-autotrophic

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 : )