ISA CERTIFIED ARBORIST EXAM 2025
QUESTIONS AND ANSWERS
Chlorophyll - ANS Makes the color or the leaves green so photosynthesis can take place
Transpiration - ANS loss of water vapor from leaves
Bark - ANS protects branches & trunk of tree from injury
Excurrent Growth - ANS Orientation of growth in external cell
M.A.D.HORSE - ANS Opposite leaf arrangement
MAPLE
ASH
DOGWOOD
HORSECHESTNUT
pH - ANS Measure of acidity or alkaline from 0 to 14
<7 acidic 7> Alkaline
7 Neutral
Decurrent Growth - ANS rounded or broader tree growth
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, Deciduous - ANS loss of leaves in the fall
Respiration - ANS process of converting food into energy
Stomata - ANS pours in leaves that open and close to allow for water transportation
Xylem - ANS transportation for the water and minerals throughout the tree
Phloem - ANS Conducts Carbohydrates
Osmosis - ANS Process how water enters roots
Organic Matter - ANS organic components that are decaying matter to help increase water
holding & nutrients to improve soil structure
Cation Exchange Capacity (CEC) - ANS measure of soils capacity to attract, retain & exchange
a positive charge
Girdling Roots - ANS roots that grow across or around the trunk, potentially choking off
vascular tissues in a tree. May cause decline or death
Taxonomy - ANS Classification of plants
Levels of Classification - ANS Kingdom > Phylum > Class > Order > Family > Genus > Species >
Specific epithet
Angiosperm - ANS flowering plant
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
QUESTIONS AND ANSWERS
Chlorophyll - ANS Makes the color or the leaves green so photosynthesis can take place
Transpiration - ANS loss of water vapor from leaves
Bark - ANS protects branches & trunk of tree from injury
Excurrent Growth - ANS Orientation of growth in external cell
M.A.D.HORSE - ANS Opposite leaf arrangement
MAPLE
ASH
DOGWOOD
HORSECHESTNUT
pH - ANS Measure of acidity or alkaline from 0 to 14
<7 acidic 7> Alkaline
7 Neutral
Decurrent Growth - ANS rounded or broader tree growth
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
, Deciduous - ANS loss of leaves in the fall
Respiration - ANS process of converting food into energy
Stomata - ANS pours in leaves that open and close to allow for water transportation
Xylem - ANS transportation for the water and minerals throughout the tree
Phloem - ANS Conducts Carbohydrates
Osmosis - ANS Process how water enters roots
Organic Matter - ANS organic components that are decaying matter to help increase water
holding & nutrients to improve soil structure
Cation Exchange Capacity (CEC) - ANS measure of soils capacity to attract, retain & exchange
a positive charge
Girdling Roots - ANS roots that grow across or around the trunk, potentially choking off
vascular tissues in a tree. May cause decline or death
Taxonomy - ANS Classification of plants
Levels of Classification - ANS Kingdom > Phylum > Class > Order > Family > Genus > Species >
Specific epithet
Angiosperm - ANS flowering plant
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
