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

a chair, a bed, and a toothbrush

explanation:

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."

some fungi obtain their nutrients from a living host (plant or animal) and are called most biotrophic fungi have fairly narrow host ranges—they are specialized on a limited called rhizomorphs that allow the fungus to grow from one tree to another. ascospores are formed inside a sac-like structure called an ascus. so your answer is a