1. List 3 organisms which would fit in each of the four parts of a pyramid representing an ecosystem in Missouri.
a) Producers
b) Primary (First-order consumers)
c) Secondary (second-order consumers)
d) Tertiary (Third-order consumers)
2. Explain why the energy obtained by the producers at the base of the pyramid becomes lower as you move up the levels.
3. Describe why the population size of organisms becomes smaller as we move from producers to tertiary consumers.