In an ecosystem, phytoplankton are _____.
a. primary consumers
b. tertiary consumers
c. producers
d. detritivores
e. secondary consumers
Answer: c. producers
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The process by which toxic substances can be concentrated in the flesh of organisms at higher trophic levels is called ____
A) biomagnification B) natural selection C) trophic concentration D) consumer distillation
Which of the following is NOT a stated co-benefit of reducing greenhouse gas emissions?
A) Improved air quality. B) Greater dependence on imported oil. C) Fewer oil tanker spills. D) Increase in renewable and sustainable energy development.
One of the discoveries which led to the modern view of the solar system was that the orbits of the planets are ________
A) parabolas B) hyperbolas C) ellipses D) circles
Which section of the Emergency Response Guidebook (ERG) provides information on isolation and evacuation distances for specific chemicals?
a. Blue b. Green c. Yellow d. Orange