Armillaria root disease Study guides, Class notes & Summaries

abiotic - ANSWER pertaining to the nonliving parts of an ecosystem, such as soil particles, bedrock, air, water. abscisic acid (ABA) - ANSWER a plant hormone that stimulates stomatal closure and promotes seed and bud dormancy. abscission zone - ANSWER a wall of cells at the base of a petiole, that allows the leaf to separate from the stem. - two functions: leaf drop and to protect the region of the stem against desiccation acceptable risk - ANSWER the amount of risk that an owner is...