NR 220 Forestry Study Guide OA
Final Exam Questions with Correct
Solutions|| Updated 2025/2026 A+
Graded||100% Guaranteed Pass!!!
Section 1: Forest Ecology & Biology
1. What is the definition of forestry?
ANSWER ✓ The science, art, and practice of managing and using for human benefit the
natural resources that occur on and in association with forested lands.
2. What are the four primary layers of a forest's structure?
ANSWER ✓ 1) Canopy, 2) Understory, 3) Shrub Layer, 4) Forest Floor (Herbaceous layer).
3. What is the role of mycorrhizal fungi in a forest ecosystem?
ANSWER ✓ They form a symbiotic relationship with tree roots, vastly increasing the root
system's ability to absorb water and nutrients, while receiving sugars from the tree in
return.
4. What is succession in forestry?
ANSWER ✓ The natural, gradual process of change in the species composition of a
forest community over time, following a disturbance or on a new site.
5. Differentiate between primary and secondary succession.
ANSWER ✓ Primary succession begins on a site devoid of soil (e.g., bare rock from a
glacier retreat). Secondary succession begins on a site where soil is already present but
the existing vegetation has been removed (e.g., after a fire or harvest).
, 6. What is a climax community?
ANSWER ✓ The theoretical final, stable stage of succession for a given site, which is in
equilibrium with the local climate and soil conditions.
7. What is the difference between a shade-tolerant and a shade-intolerant tree
species?
ANSWER ✓ Shade-tolerant species can germinate, grow, and survive in the shaded
understory of a forest (e.g., Sugar Maple, Hemlock). Shade-intolerant species require
full sunlight to establish and grow (e.g., Aspen, Jack Pine, Yellow-Poplar).
8. Define the term "snag" and explain its ecological importance.
ANSWER ✓ A snag is a standing dead tree. It is ecologically important as a source of
food (insects) and cavity-nesting sites for birds and mammals, and it contributes
nutrients to the soil as it decays.
9. What is a legacy tree?
ANSWER ✓ A large, old live tree or snag retained after a disturbance or harvest to
maintain structural diversity and provide wildlife habitat.
10. What is the main function of a tree's phloem?
ANSWER ✓ To transport sugars (photosynthates) produced in the leaves down to the
roots and other parts of the tree for growth and storage.
11. What is the main function of a tree's xylem?
ANSWER ✓ To transport water and dissolved minerals from the roots up to the leaves.
12. What is the thin layer of cells responsible for a tree's diameter growth?
ANSWER ✓ The vascular cambium, which produces new xylem (wood) to the inside and
new phloem (inner bark) to the outside.
Section 2: Silviculture & Forest Management
13. What is silviculture?
ANSWER ✓ The art and science of controlling the establishment, growth, composition,
Final Exam Questions with Correct
Solutions|| Updated 2025/2026 A+
Graded||100% Guaranteed Pass!!!
Section 1: Forest Ecology & Biology
1. What is the definition of forestry?
ANSWER ✓ The science, art, and practice of managing and using for human benefit the
natural resources that occur on and in association with forested lands.
2. What are the four primary layers of a forest's structure?
ANSWER ✓ 1) Canopy, 2) Understory, 3) Shrub Layer, 4) Forest Floor (Herbaceous layer).
3. What is the role of mycorrhizal fungi in a forest ecosystem?
ANSWER ✓ They form a symbiotic relationship with tree roots, vastly increasing the root
system's ability to absorb water and nutrients, while receiving sugars from the tree in
return.
4. What is succession in forestry?
ANSWER ✓ The natural, gradual process of change in the species composition of a
forest community over time, following a disturbance or on a new site.
5. Differentiate between primary and secondary succession.
ANSWER ✓ Primary succession begins on a site devoid of soil (e.g., bare rock from a
glacier retreat). Secondary succession begins on a site where soil is already present but
the existing vegetation has been removed (e.g., after a fire or harvest).
, 6. What is a climax community?
ANSWER ✓ The theoretical final, stable stage of succession for a given site, which is in
equilibrium with the local climate and soil conditions.
7. What is the difference between a shade-tolerant and a shade-intolerant tree
species?
ANSWER ✓ Shade-tolerant species can germinate, grow, and survive in the shaded
understory of a forest (e.g., Sugar Maple, Hemlock). Shade-intolerant species require
full sunlight to establish and grow (e.g., Aspen, Jack Pine, Yellow-Poplar).
8. Define the term "snag" and explain its ecological importance.
ANSWER ✓ A snag is a standing dead tree. It is ecologically important as a source of
food (insects) and cavity-nesting sites for birds and mammals, and it contributes
nutrients to the soil as it decays.
9. What is a legacy tree?
ANSWER ✓ A large, old live tree or snag retained after a disturbance or harvest to
maintain structural diversity and provide wildlife habitat.
10. What is the main function of a tree's phloem?
ANSWER ✓ To transport sugars (photosynthates) produced in the leaves down to the
roots and other parts of the tree for growth and storage.
11. What is the main function of a tree's xylem?
ANSWER ✓ To transport water and dissolved minerals from the roots up to the leaves.
12. What is the thin layer of cells responsible for a tree's diameter growth?
ANSWER ✓ The vascular cambium, which produces new xylem (wood) to the inside and
new phloem (inner bark) to the outside.
Section 2: Silviculture & Forest Management
13. What is silviculture?
ANSWER ✓ The art and science of controlling the establishment, growth, composition,
