May someone me? which of the following could be a characteristic of the fossil that is most closely related to humans? c-shaped back bone s-shaped backbone water-dwelling tree-dwelling

I think it would be  a c shaped backbone

It would be C Fossils aren't normally related to humans

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.