ISA Arborist Study Guide Sample Test
Questions 2024/2025 Exam All Answers
and Illustrations Given
Bark, phloem, cambium, xylem - 🧠ANSWER ✔✔When cutting through a
tree with a chain saw or drilling into a tree, you would pass through (in
order)
Growth may be stimulated in lateral buds - 🧠ANSWER ✔✔If the terminal
bud is removed in pruning:
The growth rings of a tree: - 🧠ANSWER ✔✔Visible because of the rapid
growth rate of earlywood relative to latewood, can be counted on to
approximate trees age, can give information about growth conditions in
previous years.
Cambium - 🧠ANSWER ✔✔layer of cells is responsible for outward growth
and increased girth of tree.
Mycorrhizae are: - 🧠ANSWER ✔✔A symbiotic relationship between fungi
and roots.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 1
STATEMENT. ALL RIGHTS RESERVED
, Douglas-fir (Pseudotsuga menziesii) differs from balsam fir (Abies
balsamea) in that: - 🧠ANSWER ✔✔They are not in the same genus.
Opposite leaf arrangement is: - 🧠ANSWER ✔✔When two leaves and/or
buds are located at the same node on a twig.
Quercus rubra - 🧠ANSWER ✔✔Scientific name of Red Oak.
Quercus (Oak) - 🧠ANSWER ✔✔This genus of tree usually does not have
an opposite leaf arrangement.
Pines - 🧠ANSWER ✔✔These conifers have needles in bundles.
Available oxygen and water - 🧠ANSWER ✔✔The primary factor in
controlling the depth, spread, and distribution of tree roots in the soil is/are:
The most fibrous and absorptive portion of a tree's root system is found in?
- 🧠ANSWER ✔✔Are in the upper 6 inches of soil.
Water will drain very slowly out of the planting hole. - 🧠ANSWER ✔✔If a
planting hole in a clay soil site is backfilled with sandy soil.
When soil is compacted: - 🧠ANSWER ✔✔Total pore space and the
percentage of macropores are reduced.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 2
STATEMENT. ALL RIGHTS RESERVED
Questions 2024/2025 Exam All Answers
and Illustrations Given
Bark, phloem, cambium, xylem - 🧠ANSWER ✔✔When cutting through a
tree with a chain saw or drilling into a tree, you would pass through (in
order)
Growth may be stimulated in lateral buds - 🧠ANSWER ✔✔If the terminal
bud is removed in pruning:
The growth rings of a tree: - 🧠ANSWER ✔✔Visible because of the rapid
growth rate of earlywood relative to latewood, can be counted on to
approximate trees age, can give information about growth conditions in
previous years.
Cambium - 🧠ANSWER ✔✔layer of cells is responsible for outward growth
and increased girth of tree.
Mycorrhizae are: - 🧠ANSWER ✔✔A symbiotic relationship between fungi
and roots.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 1
STATEMENT. ALL RIGHTS RESERVED
, Douglas-fir (Pseudotsuga menziesii) differs from balsam fir (Abies
balsamea) in that: - 🧠ANSWER ✔✔They are not in the same genus.
Opposite leaf arrangement is: - 🧠ANSWER ✔✔When two leaves and/or
buds are located at the same node on a twig.
Quercus rubra - 🧠ANSWER ✔✔Scientific name of Red Oak.
Quercus (Oak) - 🧠ANSWER ✔✔This genus of tree usually does not have
an opposite leaf arrangement.
Pines - 🧠ANSWER ✔✔These conifers have needles in bundles.
Available oxygen and water - 🧠ANSWER ✔✔The primary factor in
controlling the depth, spread, and distribution of tree roots in the soil is/are:
The most fibrous and absorptive portion of a tree's root system is found in?
- 🧠ANSWER ✔✔Are in the upper 6 inches of soil.
Water will drain very slowly out of the planting hole. - 🧠ANSWER ✔✔If a
planting hole in a clay soil site is backfilled with sandy soil.
When soil is compacted: - 🧠ANSWER ✔✔Total pore space and the
percentage of macropores are reduced.
COPYRIGHT©NINJANERD 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 2
STATEMENT. ALL RIGHTS RESERVED
