Under federal law, which of the following methods of raising revenue cannot be used by state governments?

a. regressive sales taxes that have a disproportionate impact on lower income people

b. property taxes on individual property other than land and buildings

c. estate taxes on the wealth and property left behind by someone who has died

d. sales taxes or duties levied on interstate trade or trade with foreign countries

genetics is the study of how dna works, the methodologies defining the new recent technologies allow scientist to have a panoramic view of the entire dna landscape, especially how genomes interact with their environment, including off course, factors outside their organisms.

thus is very possible the existence of both scenarios, where populations of isolated individuals have different genetic traits, and share traits related to genetic mutation, due rats can easily travel overseas using human transport channels. so scientists could get a vast number of data, including human interaction, evolution of rodents, health development, spread of infections, development of new organisms, how genomes evolve in different environments and so on.

" the supreme courts rulings should reflect the exact text of the constitution rather than justices own beliefs." is exactly right