Automobiles were first invented in the 1800s. they greatly increased how fast people and products could travel from one place to another. because of this, automobiles businesses function and grow quickly. however, automobiles also have had negative effects. what is one negative effect of automobiles? a. the amount of money they generate for the economy b. the fact that sometimes they don’t go as fast as you want them to go c. the amount of time they take off of travel time d. the amount of air pollution they emit

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.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.