Arborist
Arborist Certification Chapter 1
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1. Included bark - ANS ✔bark that becomes embedded in a crotch
between branch and trunk or between codominant stems and causes
a weak structure
2. Internode - ANS ✔the region of the stem between two successive
nodes
3. Lateral roots - ANS ✔side-branching root that grows horizontally
4. Lenticel - ANS ✔opening in the bark that permits the exchange of
gases
5. Meristem - ANS ✔undifferentiated tissue in which active cell
division takes place
6. Mycorrhizae - ANS ✔a symbiotic association between a fungus and
the roots of a plant
7. Node - ANS ✔slightly enlarged portion of a stem where leaves and
buds arise
Arborist Certification Chapter 1
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Arborist
8. Osmosis - ANS ✔diffusion of water through a semi-permeable
membrane from a region of higher water potential to a region of
lower water potential
9. Parenchyma cells - ANS ✔thin-walled, living cells essential in
photosynthesis and storage
10. Petiole - ANS ✔the stalk or support axis of a leaf
11. Phloem - ANS ✔plant vascular tissue that conducts
photosynthates; situated to the inside of the bark
12. Photosynthate - ANS ✔general term for the products of
photosynthesis
13. Photosynthesis - ANS ✔the process in green plants (and in
some bacteria) by which light energy is used to form organic
compounds from water and carbon dioxide
14. Phototropism - ANS ✔influence of light on the direction of
plant growth
15. Radial transport - ANS ✔movement of substances in a tree
perpendicular to the longitudinal axis of the tree
16. Ray - ANS ✔tissues that extend radially across the xylem and
phloem of a tree
Arborist Certification Chapter 1