[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-621364-105":59,"doc-detail-621364-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","edexcel-a-biology-a-level-core-practical-7-investigate-plant-mineral-deficiencies","Edexcel A Biology A-Level - Core Practical 7 - Investigate plant mineral deficiencies","","Core Practical 7 investigates how plant mineral deficiencies affect growth and development in Bryophyllum plants. The activity links key nutrients—nitrate, calcium, and magnesium—to specific biological functions and then tests plants using nutrient solutions with selected minerals removed. Bryophyllum plantlets are grown under controlled lighting conditions, with outcomes compared to identify deficiency effects. A structured risk assessment covers contamination, broken glass, and common reagents, followed by conclusions for nitrogen, magnesium, and calcium deficiencies.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":20,"@type":76,"position":81},"https://docshare.wps.com/document/exam/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/edexcel-a-biology-a-level-core-practical-7-investigate-plant-mineral-deficiencies/621364/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/edexcel-a-biology-a-level-core-practical-7-investigate-plant-mineral-deficiencies/621364.png","ImageObject",300,407,{"name":92,"@type":93},"Kyle","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-20",true,{"@type":102,"interactionType":103,"userInteractionCount":81},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"Which nutrients are tested and what roles do they play in plant function?","Question",{"text":112,"@type":113},"Nitrate is used to form DNA and amino acids, calcium is used to form calcium pectate in the middle lamella and affects membrane permeability, and magnesium is required for producing chlorophyll.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How does the practical create mineral deficiency conditions?",{"text":117,"@type":113},"Test tubes are filled with nutrient solutions containing either all minerals or specific omissions (without nitrogen, magnesium, calcium, or all nutrients), and Bryophyllum roots are placed into these solutions under a sunny window.",{"name":119,"@type":110,"acceptedAnswer":120},"What symptoms indicate each specific deficiency in the conclusion?",{"text":121,"@type":113},"Magnesium deficiency causes stunted growth and yellowed leaves; nitrate deficiency causes yellowed leaves with a red-brown cast; calcium deficiency causes stunted growth and a weakened stem.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},621364,1792465421,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":81,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":81,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":129,"read_time":39,"preview_page_count":4},3985741905716,"https://ap-avatar.wpscdn.com/davatar_994ba38a5ba835b3df7d355c54d3ed8d","Edexcel A Biology A-Level  \nCore Practical 7  \nInvestigate plant mineral deficiencies.  \nPlants require a range of nutrients to grow, survive and reproduce. These minerals include:  \n● Nitrate, which is used to form DNA and amino acids.  \n● Calcium , which is used to form calcium pectate for the middle lamella and in membrane permeability.  \n● Magnesium , which is used in the production of chlorophyll.  \nThe effects of deficiencies of any of these minerals can be investigated specifically via Bryophyllum plants. Bryophyllum reproduce asexually via budding , which produces genetically identical ‘daughter’ plantlets.  \nEquipment  \n● Bryophyllum plantlets  \n● Nutrient solutions:  \n○ All minerals present  \n○ Without nitrogen  \n○ Without magnesium  \n○ Without calcium  \n○ Without any nutrients  \n● Measuring cylinder  \n● Test tube  \n● Test tube rack  \n● Tinfoil  \nMethod  \n1. Use the measuring cylinder to fill test tubes with each of the nutrient solutions.  \n2. Cover the top of the test tube with tinfoil. Poke a hole through the tinfoil.  \n3. Push the roots of the Bryophyllum plantlets through the hole in the tinfoil into the solution.  \n4. Wrap the test tubes in tinfoil (to prevent light getting in) and place them under a sunny window.  \nRisk Assessment  \n\n| Hazard | Risk | Safety Precaution | In emergency | Risk\u003Cbr>Level |\n| --- | --- | --- | --- | --- |\n| Biohazard | Contamination | Use disinfectant; wash hands with soap after handling. | Seek assistance | Low |\n| Broken glass | Cuts from sharp object | Take care when handling glassware; keep away from edge of desk | Elevate cuts; apply pressure; do not remove glass from wound; seek medical assistance | Low |\n| Potassium nitrate | Flammable, reducing agent | Keep away from naked flame, avoid contact with metals and other flammable substances | Put out fire; seek assistance | Low |\n| Iron chloride | Irritant when solid | Wear eye protection; keep away from naked flames. | Wash eyes and skin with cold water | Low |\n| Potassium sulphate | Low hazard | Wear eye\u003Cbr>protection. | Wash eyes and skin with cold water | Low |\n\nConclusion  \n● Magnesium deficiency: stunted growth, yellowed leaves (because chlorophyll cannot be synthesised) .  \n● Nitrate deficiency: yellowed leaves with red-brown cast (because chlorophyll cannot be synthesised as protein synthesis is restricted) .  \n● Calcium deficiency: stunted growth, weakened stem (because the support from the cell wall is reduced and metabolism is restricted due to decreased membrane permeability) .","cbCaiu0DGp1Kl93R","https://ap.wps.com/l/cbCaiu0DGp1Kl93R","pdf",170413,"English","# Equipment\n# Method\n# Risk Assessment\n# Conclusion","[{\"question\":\"Which nutrients are tested and what roles do they play in plant function?\",\"answer\":\"Nitrate is used to form DNA and amino acids, calcium is used to form calcium pectate in the middle lamella and affects membrane permeability, and magnesium is required for producing chlorophyll.\"},{\"question\":\"How does the practical create mineral deficiency conditions?\",\"answer\":\"Test tubes are filled with nutrient solutions containing either all minerals or specific omissions (without nitrogen, magnesium, calcium, or all nutrients), and Bryophyllum roots are placed into these solutions under a sunny window.\"},{\"question\":\"What symptoms indicate each specific deficiency in the conclusion?\",\"answer\":\"Magnesium deficiency causes stunted growth and yellowed leaves; nitrate deficiency causes yellowed leaves with a red-brown cast; calcium deficiency causes stunted growth and a weakened stem.\"}]","Edexcel A Biology A-Level - Core Practical 7 - Investigate plant mineral deficiencies | PDF"]