The intertidal zone represents one of the most stressful environments in terms of changing environmental conditions. Explain this comment using specific examples of stresses and how organisms are able to survive in the intertidal zone
First, organisms must deal with changing water levels between low and high tide. They must also withstand the force of crashing waves. Freshwater runoff and rainfall can cause osmotic shock to organisms adapted to saltwater. In sand or cobble beaches, movement of the sand grains and cobbles creates even more problems. Rolling sand is abrasive to small organisms, and capillary forces can trap small organisms between the grains. The motion of cobbles battered by waves and trap and crush organisms between them.
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What happened to your map?
Sometimes it is useful to make a layer transparent so that the basemap (in this case the imagery) can be seen below the layer. Click on the ellipses below the USA Earthquake Risk layer name and select “Transparency.” Set transparency to 50%.
Which of the following substances contains F- ions?
A) PF3 B) F2 C) CF4 D) CaF2 E) all of the above
Polar ice caps existed through most of the Cambrian
Indicate whether the statement is true or false
Magma that solidifies below the Earth's surface produces what igneous rocks