What is an exon?

a part of dna that codes for a functional protein

a part of dna that does not code for a functional protein

the beginning part of the dna molecule

the end of part of the dna molecule

A part of the DNA that codes for a functional protein i believe

the answer for this question would be d. glaciers

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.