Which statement is evidence of the effects of the availability of resources on the number of wolves or caribou? A. When there were not enough caribou to eat in 1999, the wolf population increased.

B. When there was more food to eat in 1989, the number of wolves in a pack increased.

C. When there was less food available in 2009, the number of caribou and wolves remained constant.

D. When there was more food available in 2012, there was a decrease in the number of wolves and caribou.

Which best describes the digestive system of arthropods? a incomplete, two openings b complete, one opening c two-way, one opening d one-way, two openings

Aristotle classified animals according to their a. habitat and mating behavior c. mating behavior and relatedness b. habitat and physical differences d. physical differences and mating behavior

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