Which character shows up first in the fossil record?

Lab 12: Molecular Biology Name at least two steps used to purify DNA.

Courts will not order disgorgement by an agent of profits earned on a tainted transaction if doing so will put the principal in a better position than if the agent had complied with her duties. 

Which of the followin has the largest radium

A hydrocarbon (contains only C and H) contains 82.6% C and 17.4% H by mass. The empirical formula of the hydrocarbon is

How many moles of nitrogen are formed when 58.6 g of KNO3 decomposes according to the following reaction? The molar mass of KNO3 is 101.11 g/mol.4 KNO3(s) → 2 K2O(s) + 2 N2(g) + 5 O2(g) Show your work for full credit.

A woman with sickle cell anemia mates with a man whose (biological) mother had sickle cell anemia, but he does not have it (he is “normal”).  Which answer fits the predicted phenotype(s) of their offspring with respect to sickle cell anemia?

The most widely accepted date for the age of the Earth based on scientific evidence is about:

The DNA of an organism is studied and found to contain 30% cytosine. This organism should have __% thymine and __% adenine in its DNA.

The insertion or deletion of one nucleotide base in DNA (in an exon region) probably results in