Algae are phytoplankton capable of photosynthesis. how do ocean currents affect algae populations? a) ocean currents deposit nutrients at the ocean floor, where the algae are present. b) ocean currents push the algae to the ocean floor, where the nutrients are present. c) ocean currents move the cold, nutrient-rich water to the surface to provide renewed food source for algae. d) ocean current move algae from the poles toward the equator, where the amount of sunlight received is more.

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