1 Prepared by Pradeep Jayathilaka 071 8899027 Viharamahadevi Balika Vidyalaya 4 th Unit – Plant form and Function Biology – Structured essay and essay - 03 NB ( This questioner is prepared for English medium Students. Before answering for the questions go through your Resource book. Then answer for the all questions. At the end of the answering compare your answers with the Resource book and if there is mistake you should correct using Resource book. If you reach any difficulty relate with subject matters contact your Biology teacher. 26. What is called secondary growth of a plant? ………………………………………………………………………………………………… ………………………………………………………………………………………………… 27. Which types of plants undergo secondary growth? ………………………………………………………………………………………………… 28. What is the role of vascular cambium for secondary growth of a plant? ………………………………………………………………………………………………… ………………………………………………………………………………………………… 29. Why cork cambium is important to plants? ………………………………………………………………………………………………… 30. What are the regions of a plant which undergo secondary growth? ………………………………………………………………………………………………… 31. Briefly explain the nature of vascular cambium of a typical woody stem. ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… 32. State the location of vascular cambium of a typical woody root. ………………………………………………………………………………………………… ………………………………………………………………………………………………… 33. i. What are the two types of initials of vascular cambium? State the orientation of each. ………………………………………………………………………………………………… …………………………………………………………………………………………………