Food Supply
Bayani Gaba-gaba
For most of human history, the size of the population was capped by how much food people could gather and hunt. Then came agriculture, and with it machines, fertilisers, pesticides and selective breeding, tools that let a single farmer feed hundreds of people. The result is a booming population, but also a heavy bill for the environment.
In this lesson you will describe the five main ways humans have boosted food production, then weigh up the advantages and disadvantages of two of the most important: large-scale monocultures of crops and intensive livestock production. The skill here is balanced evaluation, giving both sides and reaching a judgement, which is exactly what examiners reward.
Manufura
- Describe how humans have increased food production, limited to: (a) agricultural machinery to use larger areas of land and improve efficiency (b) chemical fertilisers to improve yields (c) insecticides to improve quality and yield (d) herbicides to reduce competition with weeds (e) selective breeding to improve production by crop plants and livestock
- Describe the advantages and disadvantages of large-scale monocultures of crop plants
- Describe the advantages and disadvantages of intensive livestock production
Darasin Sauti
Saurari wannan darasi a cikin manhaja
Taswirar tunani
An zana wannan batu don ka ga yadda ra'ayoyi ke hadewa.
Bude taswirar tunani a cikin manhaja
Katunan tunawa
Gwaji mai sauri kan abin da ake jarraba a wannan batu.
Yi atisayen wadannan katuna a cikin manhaja
Takardar Darasi
Cikakken Bayanin Darasi Yana Kan Manhajar Green Bridge
Sami manhajar Green Bridge CBT a wayarka ko kwamfutarka domin cikakken laburaren IGCSE: takardun jarrabawar baya, tsarin kimantawa, taswirar tunani, katunan karatu da darussan sauti.
Nazarin Darasi
Barka da kammala darasi akan Food Supply. 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.
- Herbicides increase crop yield by: A. killing insect pests B. supplying mineral ions C. killing weeds that compete with the crop D. breeding better plants Answer: C
- Chemical fertilisers improve yield mainly by: A. killing weeds B. supplying mineral ions such as nitrate C. warming the soil D. removing pests Answer: B
- A disadvantage of a large-scale monoculture is that: A. yields are low B. machinery cannot be used C. a single disease can destroy the whole crop D. it increases biodiversity Answer: C
- Intensive livestock production tends to increase yield because the animals: A. move about more B. lose less energy as heat and in movement C. eat less food D. are kept outdoors Answer: B
- Which method has raised food production by letting farmers work larger areas of land? A. insecticides B. agricultural machinery C. herbicides D. selective breeding Answer: B
Yi aikin wadannan tambayoyi a cikin manhaja
Yi aikin wadannan tambayoyi a cikin manhaja
Littattafan da ake ba da shawarar karantawa
Ƙarin koyo daga tushe na buɗe
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Sashen littafi
The Importance of Biodiversity to Human Life
Identify chemical diversity benefits to humans
"Biology: The Importance of Biodiversity to Human Life" 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/47-2-the-importance-of-biodiversity-to-human-life. Access for free at https://openstax.org/books/biology/pages/1-introduction
Wasu ƙungiyoyi ne suka wallafa su ƙarƙashin lasisin buɗe, kuma muna ambaton su yadda suka nema. Hanyoyin suna buɗe shafukansu.
Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Food Supply? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
Sauke Manhajar Daga Google Playstore
Duk abin da kake buƙata don yin fice a JAMB, WAEC & NECO.
