Xylem And Phloem
Akopọ
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.
Awọn Afojusun
- 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
- 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
- [Supplement] Relate the structure of xylem vessels to their function, limited to: (a) thick walls with lignin (details of lignification are not required) (b) no cell contents (c) cells joined end to end with no cross walls to form a long continuous tube
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Ṣe ìdánrawò káàdì wọ̀nyí nínú áàpù
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Gba ohun èlò Green Bridge CBT sórí fóònù tàbí kọ̀mpútà rẹ fún gbogbo ilé ìkàwé IGCSE: ìwé ìdánwò àtijọ́, ìlànà ìdíwọ̀n, àwòrán èrò, káàdì ìkẹ́kọ̀ọ́ àti ẹ̀kọ́ ohùn.
Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Xylem And Phloem. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- 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
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Ṣiṣẹ́ lórí àwọn ìbéèrè wọ̀nyí nínú ohun èlò náà
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ẹ̀kọ́ síwájú láti àwọn orísun ṣíṣí
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Abala ìwé ẹ̀kọ́
Transport of Water and Solutes in Plants
Define water potential and explain how it is influenced by solutes, pressure, gravity, and the matric potential
"Biology: Transport of Water and Solutes in Plants" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/30-5-transport-of-water-and-solutes-in-plants. Access for free at https://openstax.org/books/biology/pages/1-introduction
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Abala ìwé ẹ̀kọ́
Stems
Describe the main function and basic structure of stems
"Biology: Stems" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/biology/pages/30-2-stems. Access for free at https://openstax.org/books/biology/pages/1-introduction
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Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Xylem And Phloem? Ṣe igbasilẹ ohun elo Green Bridge CBT lati wọle si awọn ibeere idanwo adaṣe ati awọn ayẹwo adaṣe kikun fun koko-ọrọ yii.
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