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:
food source
temperature
mates
space
differences in dallas between 2011 and 2012:
2012 was very hot in the dallas area compared to 2011.
in 2012, dallas had a drought,  while the area had more rain in 2011.

Subduction zones form when an oceanic plate collides with another oceanic plate or continental plate. the continental crust is lighter and less dense than oceanic crust. continental crust's density is approximately 2.7 grams per cubic centimeter. oceanic crust is thinner and the average density is about 3.3 cubic centimeters. when the two crustal plates converge the oceanic plate always bends and subducts beneath a continental plate. once the oceanic crust subjects, the rocks are subjected to changes in heat and pressure. because of this, we would expect to find rocks in the area of a subduction. a) clastic b) igneous c) metamorphic d) sedimentary