Sometimes it is difficult to locate an element in the periodic table. finding elements would be much easier if the elements were listed in alphabetical order. why aren't the elements listed in alphabetical order?
a. the elements are listed in the order in which they were discovered.
b. the names are not as important as the number of protons each atom has.
c. the elements are listedaalphabetically according to the greek alphabet.
d. the names and the symbols are sometimes different, and this would cause confusion.

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.

it's not c. i took the quiz and got it wrong. so my best guess is b.

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