ISA Arborist Chapter 1 Questions and Answers Already Passed

ISA Arborist Chapter 1 Questions and Answers Already Passed Abscission Zone - Answer ️️ -Area at the base of the petiole where cellular break down leads to leaf and fruit drop. Absorbing root - Answer ️️ -Fine,fibrous roots that take up water and minerals. Most absorbing roots are within the top 12 inches (30cm) of soil. Adventitious bud - Answer ️️ -Bud arising from a place other than a leaf axil or shoot tip,usually as a result of hormonal triggers. Aerial root - Answer ️️ -Aboveground roots. Usually adventitious in nature and sometimes having unique adaptive functions. Angiosperm - Answer ️️ -Plant with seeds borne in an ovary. Consist of two large groups: Monocotyledons(grasses, palms,and related plants) and dicotyledons(most woody trees,shrubs,herbaceous plants,and related plants). Contrast with gymnosperms. Anthocyanin - Answer ️️ -Red or purple pigment responsible for those colors in some parts of trees and other plants. Compare to carotenoid. Antitranspirant - Answer ️️ -Substance applied to the foliage of plants to reduce water loss(transpiration) Apical bud - Answer ️️ -Bud at the tip of a twig or shoot. Apical dominance - Answer ️️ -Condition in which the terminal bud inhibits the growth and development of the lateral buds on the same stem formed during the same season. Apical meristem - Answer ️️ -Growing point at the tips of shoots and roots. Apoplasm - Answer ️️ -Free spaces in plant tissue. Includes cell walls and intracellular spaces. Contrast with Symplasm. Auxin - Answer ️️ -Plant hormone or substance that promotes or regulates the growth and development of plants. Produced at sites were cells are dividing,primarily in the shoot tips. Auxin-like compounds may be synthetically produced. Axial transport - Answer ️️ -Movement of water,minerals or Photosynthates longitudinally with in a tree. Axillary bud - Answer ️️ -Bud in the axil of a leaf. Lateral bud. Branch bark ridge - Answer ️️ -Raised strip of bark at the top of a branch union, where the growth and expansion of the trunk or parent stem and adjoining branch push the bark into a ridge. Branch collar - Answer ️️ -Area were a branch joins another branch or trunk that is created by the over lapping vascular tiss