Cengage Advantage Books: Sustaining the Earth 10th Edition by Tyler Miller,Scott Spoolman

تمرين 7

What is ecology ? Define organism and species. Why are insects important? Distinguish among a population , habitat , and biological community and give an example of each. What is genetic diversity ? Define and describe the relationships among ecosystems , biomes , aquatic life zones , and the biosphere. Define nutrients. Distinguish between the atmosphere , troposphere , and stratosphere. Define greenhouse gases and give two examples. Distinguish between the hydrosphere and the geosphere. List and describe three major factors that sustain life on earth. Describe the natural greenhouse effect.