Movement Of Materials Through Plants
Bayani Gaba-gaba
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.
Manufura
- (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.
Takardar Darasi
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Nazarin Darasi
Barka da kammala darasi akan Movement Of Materials Through Plants. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- 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
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Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
Akwai a cikin manhajar Green Bridge
Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.
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Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Movement Of Materials Through Plants? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
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