Imagine you are a scientist studying two different T. rex fossils. Observations from one fossil suggest it is from a T. rex with a body mass of about 2,000 kg.
The other fossil is from a T. rex with a body mass of about
3,500 kg.
Based on the growth curve data, what is the age difference between these two fossilized dinosaurs?
Why can you assume the larger T. rex is more mature, not just bigger? Defend your answer using evidence from the graph.

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.)