When rapa nui (easter island) was colonized by a small number of humans it was covered with trees and abundant food types. within a thousand years the rapa nui population disappeared and the island was grassy. which of the following is the most plausible cause of the population crash? as the population increased, a. the different groups warred with each other reducing the overall population. b. the people used the island as a resting place before moving onto other islands c. the people cut down the trees for shelter and overused the food available faster than the resources were replenished d. new immigrants brought a disease with them that caused a fatal epidemic

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.)

Long term exposure to waves can cause sunburns and skin cancer.

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell