2. Use the food web above to predict the effects of reducing the deer population. (1 point)
trees increase; mountain lions decrease; foxes increase
grass increases; caterpillars decrease; foxes increase
trees decrease; mountain lions decrease; foxes increase
trees increase; robins increase; foxes increase

3. Only 10 percent of the energy stored in an organism can be passed on to the next trophic level. Of the remaining energy, some is released as heat energy, and the rest is (1 point)
used in reproduction.
stored as body tissue.
stored as fat.
used in life processes.
4. Which of the following makes the best analogy to describe the movement of energy in an ecosystem? (1 point)
pool
lake
river
pond
5. How does the amount of energy at the fourth trophic level compare to the amount of energy at the third trophic level immediately below it? (1 point)
Energy at the fourth trophic level is approximately ten times lower than energy at the third trophic level.
Energy at the fourth trophic level is approximately two times larger than energy at the third trophic level.
Energy at the fourth trophic level is approximately ten times larger than energy at the third trophic level.
Energy at the fourth trophic level is approximately two times smaller than energy at the third trophic level.