This map illustrates the number of amphibian species across the globe.   A similar pattern is observed for most taxonomic groups. Using the color coded key, what trend do you see?   

Fluctuations in population growth can correlate to changes in:

Living organisms on Earth share many common characteristics. Concerning all living things, which statements  are True or False:

Living organisms on Earth share many common characteristics. Concerning all living things, which statements  are True or False:

All of the following are functions of the lymphatic EXCEPT:

The molecule below is cholesterol. One place it is found is in the plasma membrane.  It is a  ________________.        

Extra Credit Question +1 pts (instructor graded): Based on this diagram, which of these organisms is the keystone species demonstrated in Yellowstone National Park?

In which biome would you find the permafrost layer?  

Match the terms to their definitions:

Characteristics of birds include all of the following EXCEPT: