Apopulation of hummingbirds is composed of individuals with short or long beaks, which they use to reach nectar inside flowers. a flowering trumpet vine that produces many deep, bell-shaped flowers is introduced to the region, resulting in fewer short-beaked and more long-beaked hummingbirds. which of the following conditions most likely caused this shift in the hummingbird population?
hummingbird predators avoided areas where the trumpet vine grew.
hummingbirds that compete for nectar were more successful with long beaks.
hummingbirds with short beaks overproduced offspring with longer beaks.
hummingbirds starved because the trumpet vine limited the food supply.

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.)

Identify any four organelles that should be present in the eukaryotic organism and describe the function of each organelle

The transport tubes from food came down the plant are called?