Research has shown that excessive secretion of the stress hormone can result in cell death in the hippocampal region of the brain in response to chronic stress.

In which of the following relationships is one organism always benefited while the other organism is always harmed

Consider the following reaction: 2h2 + o2 —> 2h2o a) what are the reactants in this reaction? b) what are the products in this reaction? c) how many molecules of oxygen are used in this reaction?

4.explain how these geological processes and interactions have changed earth's surface through the years. be sure to use evidence to support your answer • earthquakes • faults • ocean formation • mountains • volcanoes • island chains • seafloor spreading