Biology (Raven), 9th Edition

Chapter 39: Plant Nutrition and Soils

Pre-Test

1
Which of these is NOT a major constituent of soil?
A)organic matter
B)chlorophyll
C)water
D)air
E)organisms
2
Proton pumps in roots pump out H+, creating an electrochemical gradient that draws mineral ions into the roots.
A)H+
B)H2
C)O2
D)Ca-2
E)Na+
3
What benefits do nitrogen fixing bacteria get from the plants they assist?
A)Nitrogen
B)Amino acids
C)Protection
D)Carbohydrates
E)Water
4
Elevated temperature can affect _____ in plants.
A)Nitrogen levels
B)Carbon levels
C)Respiration
D)Amino acids
E)Carbon levels and Respiration are correct
5
Poplar trees have been shown to be important in the phytoremediation of
A)Trichloroethylene
B)Trinitrotoluene
C)Heavy metals
D)Radioactive elements
E)Medical waste
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