ISA Certified Arborist 2026 Exam with precise detailed
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answers
Chlorophyll - ✔✔Makes the color or the leaves green so photosynthesis can take place
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Transpiration - ✔✔loss of water vapor from leaves || || || || || || ||
Bark - ✔✔protects branches & trunk of tree from injury
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Excurrent Growth - ✔✔Orientation of growth in external cell
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M.A.D.HORSE - ✔✔Opposite leaf arrangement || || || || ||
MAPLE
ASH
DOGWOOD
HORSECHESTNUT
pH - ✔✔Measure of acidity or alkaline from 0 to 14
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<7 acidic 7> Alkaline
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7 Neutral
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Decurrent Growth - ✔✔rounded or broader tree growth
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Deciduous - ✔✔loss of leaves in the fall || || || || || || ||
, Respiration - ✔✔process of converting food into energy || || || || || || ||
Stomata - ✔✔pours in leaves that open and close to allow for water transportation
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Xylem - ✔✔transportation for the water and minerals throughout the tree
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Phloem - ✔✔Conducts Carbohydrates
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Osmosis - ✔✔Process how water enters roots
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Organic Matter - ✔✔organic components that are decaying matter to help increase water
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holding & nutrients to improve soil structure
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Cation Exchange Capacity (CEC) - ✔✔measure of soils capacity to attract, retain &
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exchange a positive charge || || ||
Girdling Roots - ✔✔roots that grow across or around the trunk, potentially choking off
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vascular tissues in a tree. May cause decline or death
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Taxonomy - ✔✔Classification of plants || || || ||
Levels of Classification - ✔✔Kingdom > Phylum > Class > Order > Family > Genus >
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Species > Specific epithet
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Angiosperm - ✔✔flowering plant || || ||
Gymnosperm - ✔✔Cone bearing plants and gingco || || || || || ||
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answers
Chlorophyll - ✔✔Makes the color or the leaves green so photosynthesis can take place
|| || || || || || || || || || || || ||
Transpiration - ✔✔loss of water vapor from leaves || || || || || || ||
Bark - ✔✔protects branches & trunk of tree from injury
|| || || || || || || || ||
Excurrent Growth - ✔✔Orientation of growth in external cell
|| || || || || || || ||
M.A.D.HORSE - ✔✔Opposite leaf arrangement || || || || ||
MAPLE
ASH
DOGWOOD
HORSECHESTNUT
pH - ✔✔Measure of acidity or alkaline from 0 to 14
|| || || || || || || || || ||
<7 acidic 7> Alkaline
|| || || ||
7 Neutral
||
Decurrent Growth - ✔✔rounded or broader tree growth
|| || || || || || ||
Deciduous - ✔✔loss of leaves in the fall || || || || || || ||
, Respiration - ✔✔process of converting food into energy || || || || || || ||
Stomata - ✔✔pours in leaves that open and close to allow for water transportation
|| || || || || || || || || || || || ||
Xylem - ✔✔transportation for the water and minerals throughout the tree
|| || || || || || || || || ||
Phloem - ✔✔Conducts Carbohydrates
|| || ||
Osmosis - ✔✔Process how water enters roots
|| || || || || ||
Organic Matter - ✔✔organic components that are decaying matter to help increase water
|| || || || || || || || || || || || ||
holding & nutrients to improve soil structure
|| || || || || ||
Cation Exchange Capacity (CEC) - ✔✔measure of soils capacity to attract, retain &
|| || || || || || || || || || || || ||
exchange a positive charge || || ||
Girdling Roots - ✔✔roots that grow across or around the trunk, potentially choking off
|| || || || || || || || || || || || || ||
vascular tissues in a tree. May cause decline or death
|| || || || || || || || ||
Taxonomy - ✔✔Classification of plants || || || ||
Levels of Classification - ✔✔Kingdom > Phylum > Class > Order > Family > Genus >
|| || || || || || || || || || || || || || || ||
Species > Specific epithet
|| || ||
Angiosperm - ✔✔flowering plant || || ||
Gymnosperm - ✔✔Cone bearing plants and gingco || || || || || ||
