Reflect and Respond
Dallas, Texas had an outbreak of West Nile virus, a virus spread by mosquitos, in 2012. In 2012, the mosquito population increased dramatically. What are the limiting factors for these mosquitos? What changed in Dallas between 2011 and 2012?

A sample answer should include the following:

Limiting factors for this population:

many other transport proteins, often called pumps, move materials against a concentration gradient. active transport drives molecules across a membrane from a region of lower concentration to a region of higher concentration. this process, shown in figure 5.1, uses transport proteins powered by chemi- cal energy.

c. heat from the poles back down towards the equator.

bradykinin is a physiologically and pharmacologically active peptide of the kinin group of proteins, consisting of nine amino acids.