Xylem And Phloem
Overview
A tall tree pulls hundreds of litres of water up from its roots and sends sugar made in its leaves down to its roots, all without a heart or a pump. It does this through two specialised transport tissues running like pipework through every root, stem and leaf: the xylem and the phloem.
In this lesson you will learn exactly what each tissue carries and where to find them in a plant. Extended students will see how the structure of a xylem vessel, hollow, lignified and joined end to end, makes it a perfect water pipe.
Objectives
- [Core] State the functions of xylem and phloem: (a) xylem - transport of water and mineral ions, and support (b) phloem - transport of sucrose and amino acids
- [Core] Identify in diagrams and images the position of xylem and phloem as seen in sections of roots, stems and leaves of non-woody dicotyledonous plants
Lesson Note
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Lesson Evaluation
Congratulations on completing the lesson on Xylem And Phloem. Now that youve explored the key concepts and ideas, its time to put your knowledge to the test. This section offers a variety of practice questions designed to reinforce your understanding and help you gauge your grasp of the material.
You will encounter a mix of question types, including multiple-choice questions, short answer questions, and essay questions. Each question is thoughtfully crafted to assess different aspects of your knowledge and critical thinking skills.
Use this evaluation section as an opportunity to reinforce your understanding of the topic and to identify any areas where you may need additional study. Don't be discouraged by any challenges you encounter; instead, view them as opportunities for growth and improvement.
- Which tissue transports water and mineral ions in a plant? A. phloem B. xylem C. epidermis D. cortex Answer: B
- Phloem transports: A. water only B. mineral ions C. sucrose and amino acids D. oxygen Answer: C
- In a stem, the xylem in a vascular bundle is usually found: A. on the outside of the bundle B. on the inside of the bundle C. in the epidermis D. in the root cap Answer: B
- [Supplement] Xylem vessel walls are strengthened by: A. starch B. cellulose only C. lignin D. protein Answer: C
- [Supplement] A xylem vessel is well suited to transporting water because it is: A. full of cytoplasm B. hollow and joined end to end C. made of many cross walls D. alive and dividing Answer: B
Available on the Green Bridge App
Download the Green Bridge CBT app on your phone or computer to access full lesson notes, practice questions, and more.
Available on the Green Bridge App
Download the Green Bridge CBT app on your phone or computer to access full lesson notes, practice questions, and more.
Recommended Books
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