On the internet, read about the Clean Air Act of 1990: a. Summarize what it says.

b. How should it help with the problem of acid rain?

c. How successful has it been in reducing the harmful chemicals from the burning of fossil fuels that cause acid rain?

d. What can you do personally to help alleviate the problem of acid rain?

3. Find two examples of actual ecological places that have been affected by acid rain. Tell their location and describe what happened.

The dna in a cell’s nucleus encodes proteins that are eventually targeted to every membrane and compartment in the cell, as well as proteins that are targeted for secretion from the cell. for example, consider these two proteins: phosphofructokinase (pfk) is an enzyme that functions in the cytoplasm during glycolysis. insulin, a protein that regulates blood sugar levels, is secreted from specialized pancreatic cells. assume that you can track the cellular locations of these two proteins from the time that translation is complete until the proteins reach their final destinations.for each protein, identify its targeting pathway: the sequence of cellular locations in which the protein is found from when translation is complete until it reaches its final (functional) destination. (note that if an organelle is listed in a pathway, the location implied is inside the organelle, not in the membrane that surrounds the organelle.)

Name the part of the the brain labeled "e".

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .