Evidence found in sedimentary rock layers suggests which 2 of the following? Organisms which could not adapt to changing environmental conditions evolved into new species.
Organisms which could not adapt to changing environmental conditions went extinct.
Dinosaurs evolved into fish.
Dinosaurs evolved into birds.
Humans once lived with dinosaurs.
Dinosaurs went extinct due 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.