ISA ARBORIST STUDY GUIDE SAMPLE
TEST EXAM 2025 QUESTIONS AND
ANSWERS
When cutting through a tree with a chain saw or drilling into a tree, you would pass through (in
order) - ANS Bark, phloem, cambium, xylem
If the terminal bud is removed in pruning: - ANS Growth may be stimulated in lateral buds
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. -
ANS The growth rings of a tree:
layer of cells is responsible for outward growth and increased girth of tree. - ANS Cambium
A symbiotic relationship between fungi and roots. - ANS Mycorrhizae are:
They are not in the same genus. - ANS Douglas-fir (Pseudotsuga menziesii) differs from
balsam fir (Abies balsamea) in that:
When two leaves and/or buds are located at the same node on a twig. - ANS Opposite leaf
arrangement is:
1|P a g e C o p y r i g h t © 2 0 2 5 T H E B R I G H T A L L R I G H T S R E S E R V E D
, Scientific name of Red Oak. - ANS Quercus rubra
This genus of tree usually does not have an opposite leaf arrangement. - ANS Quercus (Oak)
These conifers have needles in bundles. - ANS Pines
The primary factor in controlling the depth, spread, and distribution of tree roots in the soil
is/are: - ANS Available oxygen and water
Are in the upper 6 inches of soil. - ANS The most fibrous and absorptive portion of a tree's
root system is found in?
If a planting hole in a clay soil site is backfilled with sandy soil. - ANS Water will drain very
slowly out of the planting hole.
Total pore space and the percentage of macropores are reduced. - ANS When soil is
compacted:
They tend to become alkaline, and salts build up due to the lack of heavy rainfall. - ANS A
characteristic of sandy soils in arid regions is:
Infrequent, deep soakings are preferable to frequent, shallow waterings. - ANS When
irrigating trees:
Have a higher infiltration rate than clay soils. - ANS Sandy soils:
Gravitational water has drained away. - ANS A soil is at field capacity when:
2|P a g e C o p y r i g h t © 2 0 2 5 T H E B R I G H T A L L R I G H T S R E S E R V E D
TEST EXAM 2025 QUESTIONS AND
ANSWERS
When cutting through a tree with a chain saw or drilling into a tree, you would pass through (in
order) - ANS Bark, phloem, cambium, xylem
If the terminal bud is removed in pruning: - ANS Growth may be stimulated in lateral buds
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. -
ANS The growth rings of a tree:
layer of cells is responsible for outward growth and increased girth of tree. - ANS Cambium
A symbiotic relationship between fungi and roots. - ANS Mycorrhizae are:
They are not in the same genus. - ANS Douglas-fir (Pseudotsuga menziesii) differs from
balsam fir (Abies balsamea) in that:
When two leaves and/or buds are located at the same node on a twig. - ANS Opposite leaf
arrangement is:
1|P a g e C o p y r i g h t © 2 0 2 5 T H E B R I G H T A L L R I G H T S R E S E R V E D
, Scientific name of Red Oak. - ANS Quercus rubra
This genus of tree usually does not have an opposite leaf arrangement. - ANS Quercus (Oak)
These conifers have needles in bundles. - ANS Pines
The primary factor in controlling the depth, spread, and distribution of tree roots in the soil
is/are: - ANS Available oxygen and water
Are in the upper 6 inches of soil. - ANS The most fibrous and absorptive portion of a tree's
root system is found in?
If a planting hole in a clay soil site is backfilled with sandy soil. - ANS Water will drain very
slowly out of the planting hole.
Total pore space and the percentage of macropores are reduced. - ANS When soil is
compacted:
They tend to become alkaline, and salts build up due to the lack of heavy rainfall. - ANS A
characteristic of sandy soils in arid regions is:
Infrequent, deep soakings are preferable to frequent, shallow waterings. - ANS When
irrigating trees:
Have a higher infiltration rate than clay soils. - ANS Sandy soils:
Gravitational water has drained away. - ANS A soil is at field capacity when:
2|P a g e C o p y r i g h t © 2 0 2 5 T H E B R I G H T A L L R I G H T S R E S E R V E D
