Any given enzyme
a. can be used for many different kinds of chemical reactions.
b. is permanently changed during a chemical reaction.
c. has a special site where the products bind before the reaction begins.
d. increases the rate that reactions will occur.
e. can cause a reaction to occur that never normally occurs.

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