Please place the steps of primary succession in order from first (top) to last (bottom). 1. Deciduous tree move in
2. Pioneer species arrives (like lichen)
3. Evergreen trees start growing
4. Small plants start to grow
5. Soil starts forming and mosses begin growing
6. Exposed bare rock due to volcanic eruption or glacier

Explanation is in the file

cutt.ly/nz6VGda

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.