ISA CERTIFIED ARBORIST EXAM 2025 || 60+ ACTUAL
QUESTIONS & CORRECT DETAILED ANSWERS
1. Chlorophyll Makes the color or the leaves green so photosynthesis can take place
2. Transpiration loss of water vapor from leaves
3. Bark protects branches & trunk of tree from injury
4. Excurrent Growth Orientation of growth in external cell
5. M.A.D.HORSE Opposite leaf arrangement
MAPLE
ASH
DOGWOOD
HORSECHESTNUT
6. pH Measure of acidity or alkaline from 0 to 14
<7 acidic 7> Alkaline
7 Neutral
7. Decurrent rounded or broader tree growth
Growth
8. Deciduous loss of leaves in the fall
9. Respiration process of converting food into energy
10. Stomata pours in leaves that open and close to allow for water transportation
11. Xylem transportation for the water and minerals throughout the tree
12. Phloem Conducts Carbohydrates
13. Osmosis Process how water enters roots
14. Organic Matter organic components that are decaying matter to help increase water holding &
nutrients to improve soil structure
, ISA CERTIFIED ARBORIST EXAM 2025 || 60+ ACTUAL
QUESTIONS & CORRECT DETAILED ANSWERS
15. Cation Exchange measure of soils capacity to attract, retain & exchange a positive charge
Capacity (CEC)
16. Girdling Roots roots that grow across or around the trunk, potentially choking ott vascular tissues
in a tree. May cause decline or death
17. Taxonomy Classification of plants
18. Levels of Classifi- Kingdom > Phylum > Class > Order > Family > Genus > Species > Specific epithet
cation
19. Angiosperm flowering plant
20. Gymnosperm Cone bearing plants and gingco
21. Cultivar Cultivated Variety for a tree/shrub
22. Monocot one seed leaf
23. Drill Hole Method aerates the soil 2-4 inches into ground around drip line and uses granular fertilizer.
24. Surface Applica- applied fertilizer over surface using spreader
tion
25. Apical Meristems located at the end of the shoot
26. Apical Domi- tendency for terminal buds to inhibit growth of lateral buds
nance
27. CODIT Compartmentalization Of Decay In Trees or
4 Steps trees use to heal itself from decay
28. Photosynthesis process that a tree/plant uses to create food/energy
QUESTIONS & CORRECT DETAILED ANSWERS
1. Chlorophyll Makes the color or the leaves green so photosynthesis can take place
2. Transpiration loss of water vapor from leaves
3. Bark protects branches & trunk of tree from injury
4. Excurrent Growth Orientation of growth in external cell
5. M.A.D.HORSE Opposite leaf arrangement
MAPLE
ASH
DOGWOOD
HORSECHESTNUT
6. pH Measure of acidity or alkaline from 0 to 14
<7 acidic 7> Alkaline
7 Neutral
7. Decurrent rounded or broader tree growth
Growth
8. Deciduous loss of leaves in the fall
9. Respiration process of converting food into energy
10. Stomata pours in leaves that open and close to allow for water transportation
11. Xylem transportation for the water and minerals throughout the tree
12. Phloem Conducts Carbohydrates
13. Osmosis Process how water enters roots
14. Organic Matter organic components that are decaying matter to help increase water holding &
nutrients to improve soil structure
, ISA CERTIFIED ARBORIST EXAM 2025 || 60+ ACTUAL
QUESTIONS & CORRECT DETAILED ANSWERS
15. Cation Exchange measure of soils capacity to attract, retain & exchange a positive charge
Capacity (CEC)
16. Girdling Roots roots that grow across or around the trunk, potentially choking ott vascular tissues
in a tree. May cause decline or death
17. Taxonomy Classification of plants
18. Levels of Classifi- Kingdom > Phylum > Class > Order > Family > Genus > Species > Specific epithet
cation
19. Angiosperm flowering plant
20. Gymnosperm Cone bearing plants and gingco
21. Cultivar Cultivated Variety for a tree/shrub
22. Monocot one seed leaf
23. Drill Hole Method aerates the soil 2-4 inches into ground around drip line and uses granular fertilizer.
24. Surface Applica- applied fertilizer over surface using spreader
tion
25. Apical Meristems located at the end of the shoot
26. Apical Domi- tendency for terminal buds to inhibit growth of lateral buds
nance
27. CODIT Compartmentalization Of Decay In Trees or
4 Steps trees use to heal itself from decay
28. Photosynthesis process that a tree/plant uses to create food/energy
