3. A student found a substance with a mass of 6.95 g and a volume of 4.0 10 points cm^3. Based on the table of densities shown below, which could be the
unknown substance? *
Densities of Some known Substances
Substance (g/cm)
Density
Calcium
Carbon
Magnesium
Phosphorus
Platinum
Sulfur
1.54
2.27
1.74
1.82
21.46
2.07
O Calcium
Carbon
Ο Ο Ο Ο
O Magnesium
Phosphorus

Dna is colied into chromosomes in a cell

How does the molecular clock work? a. it analyzes the brain functionality of two different species.b. it examines and compares the physical characteristics of two different species.c. it illustrates relationships between two different species.d. it compares the number of mutations that exist in the dna of two different species.

Approximately 90% of all cases of polycystic kidney disease are inherited in an autosomal dominant fashion. the disease is typically related to mutations to genes (pkd1 and pkd2). pkd genes can be found on chromosome 16. the disease occurs in approximately 1: 800 to 1: 1000 people. here is a hypothetical example. the dominant allele d will cause the development of pkd. the recessive allele is known as d. what genotypes would correspond to suffering from pkd? dd, dd what genotypes would correspond to being normal (not suffering from pkd)? dd consider that 1: 1,000 people have pkd in your population of 325million. consider that pkd is inherited in an autosomal dominant fashion. show you math for all of the following questions: what is the genotypic frequency for dd? what is the genotypic frequency for dd? what is the genotypic frequency for dd? what is p? what is q? how many people in your population would have pkd?