Movement Of Materials Through Plants
Gbogbo ọrọ náà
A maize plant standing in a dry field is moving water every second of the day. It pulls water from between the soil particles, lifts it metres up a hollow pipework of dead cells, and lets most of it escape as vapour from tiny pores under its leaves. At the same time it is building sugar out of air and sending that food down to its roots and grains. Nothing in the plant has a heart or a pump; the whole traffic is driven by diffusion, osmosis and the simple fact that water evaporates.
In this lesson you will follow materials all the way through a crop plant: in at the root hairs, up the xylem, into the leaf for photosynthesis, and back out through the phloem to the storage organs. You will see why a leaf is built the way it is, how the stomata trade gases, and why hot, dry, windy weather makes a crop wilt. These are the ideas a farmer uses every time they irrigate, space a crop or choose when to transplant.
Ebumnobi
- (a) describe the distribution and function of root tissues and the structure and function of root hairs.
- (b) explain the absorption of plant requirements from the soil, including the principles of diffusion, osmosis, the passage of water and dissolved mineral salts through vascular tissues.
- (c) explain how the structure of a leaf is related to function (cellular detail is not required).
- (d) outline gas exchange by diffusion through the stomata.
- (e) describe photosynthesis in terms of carbon dioxide, water, light and chlorophyll leading to the synthesis of carbohydrates and the production of oxygen.
- (f) describe the distribution and function of tissues in a stem (dicotyledon only).
- (g) define the term translocation as the movement of synthesised food to storage organs and explain the principles of modification of different parts of plants to form food storage organs and the types of food materials stored.
- (h) explain transpiration in terms of the transpiration stream, loss of water by evaporation and diffusion of water vapour through stomata.
- (i) describe the effects of temperature, humidity, wind and light intensity on the rate of transpiration.
Nkuzi Olu
Gee ntị na nkuzi a na ngwa
Maapụ uche
E seela isiokwu a ka ị hụ otu echiche si ejikọta.
Mepee maapụ uche na ngwa
Kaadị ncheta
Omume ncheta ngwa ngwa n'ihe a na-anwale n'isiokwu a.
Mee omume kaadị ndị a na ngwa
Akwụkwọ Ọmụmụ
Ndetu Nkuzi Zuru Ezu di na Ngwa Green Bridge
Nweta ngwa Green Bridge CBT na ekwenti gi ma o bu kompiuta maka ulo akwukwo IGCSE zuru oke: akwukwo ule ndi gara aga, usoro nyocha, eserese uche, kaadi omumu na nkuzi olu.
Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Movement Of Materials Through Plants. 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 process takes water into a root from the soil? A. Active uptake B. Osmosis C. Transpiration D. Translocation Answer: B
- In a leaf, gases are exchanged with the air mainly through the: A. Xylem B. Waxy cuticle C. Stomata D. Veins Answer: C
- Which tissue carries food made in the leaves to the storage organs? A. Xylem B. Phloem C. Epidermis D. Cortex Answer: B
- Which set of conditions would give the fastest rate of transpiration? A. Cool, humid and still B. Cool, dry and still C. Hot, humid and still D. Hot, dry and windy Answer: D
- Photosynthesis produces glucose and which gas? A. Carbon dioxide B. Nitrogen C. Oxygen D. Hydrogen Answer: C
Rue ajuju ndi a n'ime ngwa ahu
Rue ajuju ndi a n'ime ngwa ahu
Akwụkwọ A Na-atụ Aro
Mụtakwuo ihe site na isi mmalite mepere emepe
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Akụkụ akwụkwọ
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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Akụkụ akwụkwọ
Leaves
Identify the parts of a typical leaf
"Biology: Leaves" 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/30-4-leaves. Access for free at https://openstax.org/books/biology/pages/1-introduction
Ndị otu ndị ọzọ bipụtara ha n'okpuru ikike mepere emepe, anyị na-ekele ha dị ka ha si chọọ. Njikọ na-emepe saịtị ha.
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Movement Of Materials Through Plants? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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Ihe nile ichoro iji nwee ihe ịga nke ọma na JAMB, WAEC & NECO.
