ISA Certified Arborist Exam Study Guide with Complete Solutions 2024 guard cells - Correct Answer Pair of specialized cells that regulate the opening and closing of stomate due to the change in water pressure within cells.Functions of root system - Correct Answer Absorb and conduct water and minerals, anchor and support plant, storage of extra food and produce hormones.Tropism - Correct Answer Tendency of growth or variation of a plant in response to an external stimulus such as gravity or light.Geotropism - Correct Answer plant growth produced as a response to the force of gravity, either positive, as in the direction of gravity (roots), or negative, as in opposite the direction of gravity (shoots) Phototropism - Correct Answer Influence of light on the direction of plant growth. Tendency of plants
to grow toward light.:
excurrent - Correct Answer tree growth habit characterized by a central leader and pyramidal crown.decurrent - Correct Answer rounded or spreading growth habit of the crown of a tree.Respiration - Correct Answer In plants, process by which carbohydrates are converted into energy by using oxygen.Gymnosperms - Correct Answer Plants with exposed seeds, usually within cones.Angiosperms - Correct Answer Plant with seeds born in an ovary. Consists of two large groups: monocotyledons (grasses, palms, and related plants) and dicotyledons (mostly woody trees, shrubs and herbaceous plants, and related plants).Fall foliage color - Correct Answer Results from the breakdown of chlorophyll and the expression of other pigments in the leaf. Anthocyanins (reds and purples) and carotenoids (yellows, oranges and reds) are expressed. 1 / 2
plant growth regulators - Correct Answer naturally occurring compounds that act in small quantities to regulate plant growth and development.•Auxin, gibberellins, cytokinins, ethylene, abscissic acid Taxonomy - Correct Answer Science that studies the description, denomination, and classification of living organisms based on their similarities and differences Morphology - Correct Answer Study of the form and structure of plants and other living organisms Dicotyledon - Correct Answer Plant with two cotyledons in its embryo; netted or palmate leaf veins; and flowers with three, four, or five petals, or petals in multiples of these numbers Monocotyledon - Correct Answer Plant with an embryo that has one seed leaf (cotyledon). Examples are grasses and palms.Palmate - Correct Answer Type of compound leaf with veins or leaflets radiating in a fanlike pattern.Pinnate - Correct Answer Type of compound leaf, with leaflets along each side of a compound axis.compound leaf - Correct Answer Leaf with two or more leaflets.simple leaf - Correct Answer a leaf with a single blade opposite - Correct Answer Pertaining to a leaf or branch arrangement, leaves or branches situated two at a node, across from each other on the stem alternate - Correct Answer Pertaining to bud or leaf arrangement, one leaf or bud at each node, situated at alternating positions on the stem. I'm this arrangement, leaves are not directly across from each other.whorled - Correct Answer Leaves, twigs or branches arranged in a circle around a point on the stem.Leaching - Correct Answer The process in which ions of essential elements wash down through the soil profile and are lost.
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