This model shows a human embryo. What can you determine about its development from the model? It has a postanal tail.
It’s a vertebrate
It has pharyngeal arches.
It has fully developed organ systems.

47

explanation:

ok

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 : )

i think that it is c, d, and e, hope this

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