Cindy hypothesizes that if she adds salt to a weak acid, then its ph will be lowered. she develops the following experiment to test her hypothesis. which of the following steps could compromise the validity of her experiment?

fill two beakers with 50 ml of the same weak acid.
add salt to the first beaker.
add water to the second beaker.
measure the ph of the solution in each beaker.

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.)

According to the cladogram, which organisms have roundworms as a common ancestor?

Phosgene is a chemical agent that is formed by decomposition of chlorinated hydrocarbon solvents by ultraviolet radiation. a. false b. true