Chapter 25 Ecology

Chapter 25 Ecology

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

Multiple Choice Questions

1. All the living organisms plus the environmental factors present in a given area constitute
   A.a plant community.
   B. a biotic community.
   C. an ecosystem.
   D. a food chain.
   E. a food web.

Stern – 025 Chapter… #1
 

2. Which of the following estimates or calculations are made with respect to populations?
   A. numbers of individuals
   B.  density
   C.  biomass
   D.  geographical range
   E.  All of these answers are correct.

Stern – 025 Chapter… #2
 

3. In an energy pyramid summary of an ecosystem ___________________________.
   A. there is much more energy at the top than at the bottom.
   B.  there is little reduction in energy retained from one level to the next.
   C.  secondary consumers are sustained with less energy than primary consumers.
   D.  there is much more energy at the bottom than at the top.
   E.  the individual components do not function in a regulatory fashion.

Stern – 025 Chapter… #3
 

4. Chemicals produced by higher plants that kill or inhibit disease fungi or bacteria are known as ________________.
   A. antibiotics.
   B.  herbicides.
   C.  immunotoxins.
   D.  organic microcides.
   E.  phytoalexins.

Stern – 025 Chapter… #6
 

5. The factors that allow organisms to grow, compete, reproduce, and perpetuate the species are part of a field of inquiry called
   A.physiology.
   B. ecology.
   C. taxonomy.
   D. biochemistry.
   E. morphology.