Xylem And Phloem
Gbogbo ọrọ náà
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.
Ebumnobi
- 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
Akọmọ Ojú-ẹkọ
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ayẹwo Ẹkọ
Ekele diri gi maka imecha ihe karịrị na Xylem And Phloem. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- 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
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Àwọn Ìwé Tó Dáa Láti Kà
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Xylem And Phloem? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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