Human Impacts on the Earth:Question 1 How have human activities such as building increasingly larger
cities and converting grassland to farmland affected extinction
rates of living organisms?

it is increasing it because it is pushing animals out of their ecosystem and destroying their food sources and homes.

Explanation:

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.