Which statements are true about william smith's discoveries? choose one or more: a. fossils are randomly distributed throughout the rock record. b. the relative vertical order of fossils is the same in all outcrops. c. using fossils, the relative order in which different rock layers were deposited is discernable. d. not all fossil species are present in all locations.

options C) using fossils, the relative order in which different rock layers were deposited is discernable.

Explanation: This is because from his discovery, he found out that different rock layers contains different fossils.

He realised that rock layers formation occurs in a particular pattern and could be determined and related to a distant rock from the type of fossils that is found within it.

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.