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9.) Scientists observed that the populations of top-level consumers in a particular
ecosystem were rapidly decreasing. Further studies revealed that there was also a
decline in producer productivity. Which other changes did the scientists most likely
observe in the ecosystem?
a. Increased producer diversity
b. Decreased population size at all levels
c. Decreased primary consumer populations only
d. Increased primary and secondary consumer diversity
10.)
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 used for the organism’s life
processes, and the rest is:
a. Used in reproduction
b. Stored in body tissue
c. Stored as fat
d. Eliminated as heat
11.)
What would happen if the population of the bird species shown in the ecosystem
were to suddenly decrease?
a.
b.
c.
d.
The grasshopper population would increase
The fish population would increase
The fish would occupy the birds niche
The fish and grasshoppers would compete for resources