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This study guide provides a concise overview of key concepts in tree biology relevant to isa arborist certification. It covers topics such as tree growth patterns (excurrent, decurrent), symbiotic relationships (mycorrhizae), respiration, leaf types (deciduous, evergreen), plant growth regulators (auxin), and essential structures like chlorophyll, cuticle, petiole, internode, lenticel, and ray cells. The guide also addresses root functions, photosynthesis, transpiration, water transport (xylem, phloem), cambium, branch structure, and tree defense mechanisms (codit). It serves as a quick reference for arborists preparing for certification, focusing on fundamental botanical principles related to tree health and management. Useful for students and professionals in arboriculture, forestry, and related fields.
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Excurrent, Decurrent - ✔️ ✔ Correct Answer Trees with upright growth and a strong, central leader are said to exhibit __________ growth. Mycorrhizae - ✔️ ✔ Correct Answer Roots and fungi form ___________, which are a symbolic relationship, aiding in the uptake of water and minerals. Respiration - ✔️ ✔ Correct Answer The process by which chemical engery, stored as sugars and starch, is released is called ___________. Deciduous, Evergreen - ✔ ️ ✔ Correct Answer Trees that lose their leaves in the autumn are called __________. Trees that maintain their leaves for more than one year are called ___________. Auxin - ✔️ ✔ Correct Answer Plant growth regulator
Chlorophyll - ✔️ ✔ Correct Answer Green pigment
Cuticle - ✔️ ✔ Correct Answer Waxy covering of a leaf Petiole - ✔️ ✔ Correct Answer "Stalk" of a leaf
Internode - ✔️ ✔ Correct Answer Between the nodes of a twig Lenticel - ✔️ ✔ Correct Answer Small openings in stems for gas exchange Ray - ✔️ ✔ Correct Answer Cells that cross the phloem and xylem for radial transport Absorbing roots - ✔️ ✔ Correct Answer Mostly located in the upper 12 inches (30 cm) of soil Source - ✔️ ✔ Correct Answer Mature, green leaves -- sugar producers Sink - ✔️ ✔ Correct Answer Uses for energy than it produces.
Apical - ✔️ ✔ Correct Answer Meristems located at the end of the shoots are called primary or __________ meristems. Apical dominance - ✔ ️ ✔ Correct Answer The tendency for terminal buds to inhibit the growth of lateral buds is called __________. Leaves - ✔️ ✔ Correct Answer The "food factories" of trees are the _________. Photosynthesis, Oxygen - ✔️ ✔ Correct Answer The procress of ___________ combines carbon dioxide and water in the reaction driven by light to produce sugars. __________ is also a product of this reaction. Chlorophyll - ✔️ ✔ Correct Answer The green color of leaves is created by the presence of _________, which is necessary for photosynthesis.
Transpiration - ✔ ️ ✔ Correct Answer ___________ is the loss of water vapor from the leaves. Stomata, guard cells - ✔️ ✔ Correct Answer The opening and closing of _________ allow for gas exchange, and transpiration is controlled by the __________ _________. Xylem, Phloem - ✔️ ✔ Correct Answer Water and dissolved essential minerals are transported within the tree in the ________. The __________ conducts carbohydrates. Cambium - ✔ ️ ✔ Correct Answer The _________ is a layer of meristematic cells located between the phloem and xylem. Branch collar, Branch bark ridge - ✔️ ✔ Correct Answer The _________ _________ is formed when trunk tissue grows around branch tissues. As the branch and trunk tissues expand against each other in the branch union, the ________ ____ ________ is formed.