Use the LAW OF CONSERVATION OF MASS to fill out the missing information in the table below. Mass of Reactants = Mass of Products

Reaction Reactant(s) Product(s)
4. H2 O2 H2O
mass 3.4g ? 13.4g
5. HgO Hg O2
mass 23.6g ? 13.0g
6. Li O2 Li2O
mass ? 5.7g 24.6g
7. Al(OH)3 Al2O3 H2O
mass ? 21.8g 9.7g

4

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.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".