A rock contains a glassy, vesicular texture and is composed mainly of potassium feldspar and quartz. State the name of rock B. * two elements that make up the chemical composition of the mineral in quartzite *

blah

explanation:

bc blah

i think it is dna, i'm not totally sure but i think it might be.

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion

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.