ISA Certified Arborist Exam Question & Answers 2025.docx

ISA Certified Arborist Exam Question
& Answers 2025
Chlorophyll - CORRECT ANSWERS ✔✔Makes the color
or the leaves green so photosynthesis can take place


Transpiration - CORRECT ANSWERS ✔✔loss of water
vapor from leaves


Bark - CORRECT ANSWERS ✔✔protects branches &
trunk of tree from injury


Excurrent Growth - CORRECT ANSWERS
✔✔Orientation of growth in external cell


M.A.D.HORSE - CORRECT ANSWERS ✔✔Opposite leaf
arrangement
MAPLE
ASH
DOGWOOD
HORSECHESTNUT


pH - CORRECT ANSWERS ✔✔Measure of acidity or
alkaline from 0 to 14
<7 acidic 7> Alkaline

, ISA Certified Arborist Exam Question
& Answers 2025
7 Neutral


Decurrent Growth - CORRECT ANSWERS ✔✔rounded
or broader tree growth


Deciduous - CORRECT ANSWERS ✔✔loss of leaves in
the fall


Respiration - CORRECT ANSWERS ✔✔process of
converting food into energy


Stomata - CORRECT ANSWERS ✔✔pours in leaves
that open and close to allow for water transportation


Xylem - CORRECT ANSWERS ✔✔transportation for
the water and minerals throughout the tree


Phloem - CORRECT ANSWERS ✔✔Conducts
Carbohydrates


Osmosis - CORRECT ANSWERS ✔✔Process how water
enters roots