Part B: Analyze and Extend Question 1
Calculate the percentage of limestone that dissolved from each solution. Start by subtracting the final mass from the
initial mass. Divide that number by the initial mass. Then multiply the result by 100 to make it a percent. Use this formula:
percent dissolved initial mass - final mass
x 100
Initial mass
Record the percentage of limestone dissolved in each acid concentration. Consult the math review e if you need further
help with percentages.
B
Ių x x
Font Sizes
A- A - E 2
0% Acid
33% Acid
66% Acid
100% Acid
Percent dissolved

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry

Astudy by solloch and et. al., in 2017, gives the map above which shows the frequency of alleles with a ccr5-delta32 mutations over 87 different countries. this mutation deletes the presence of a co-receptor (ccr5) on the outside of human t-cells (lymphocytes). some viruses, such as the one responsible for the black death and human immunodeficiency virus (hiv), require this receptor for attachment to host cells during the infection process. the black death was an epidemic that passed over northern europe during the 14th century killing nearly 60% of europeans. according to this information, which explanation best explains why northern europeans show a greater immunity for hiv than some other parts of the world?