Which device was not invented in the early 1900s? Question 7 options:

A)

Electric vacuum cleaner

B)

Electric refrigerator

C)

Electric toaster

D)

Electric car

Explanation:

Electric Vacuum cleaner- 1901

Electric Toaster- 1893

Electric refrigerator- 1913

Electric car - 1884

Electric Car

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.

as in mitosis, dna replication occurs during interphase.   in meiosis, it occurs specifically in s phase of interphase 1.