How does tobacco smoke affect the body? a. it blocks hemoglobin from binding to carbon dioxide, thus affecting gas exchange in the lungs. b. it paralyzes cilia in the bronchi allowing inhaled particles to enter the lungs. c. it causes an increase in heart rate and blood pressure. d. all of the above

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.)

Talking listening and reacting non verbally are all part of communicating

How are fossils used to date organisms?