AQA Biology GCSE 3.3 Plant Disease Flashcards PDF

AQA Biology GCSE 3.3 - Plant Disease Flashcards PMT Education is licensed under https://bit.ly/pmt-cc This work by https://bit.ly/pmt-edu-cc CC BY-NC-ND 4.0 https://bit.ly/pmt-cc...

AQA Biology GCSE 3.3 - Plant Disease Flashcards PMT Education is licensed under https://bit.ly/pmt-cc This work by https://bit.ly/pmt-edu-cc CC BY-NC-ND 4.0 https://bit.ly/pmt-cc https://bit.ly/pmt-edu https://bit.ly/pmt-cc How do aphids cause damage to plants? https://bit.ly/pmt-cc https://bit.ly/pmt-edu https://bit.ly/pmt-cc How do aphids cause damage to plants? They use their sharp mouthparts to extract sap from the plant phloem, weakening the plant. They are also vectors who can transfer pathogens from diseased plants to healthy plants. https://bit.ly/pmt-cc https://bit.ly/pmt-edu https://bit.ly/pmt-cc How can we reduce the number of aphids? https://bit.ly/pmt-cc https://bit.ly/pmt-edu https://bit.ly/pmt-cc How can we reduce the number of aphids? Chemical pesticides Biological pest control - using ladybirds https://bit.ly/pmt-cc https://bit.ly/pmt-edu https://bit.ly/pmt-cc Why do plants need a good supply of nitrate ions? https://bit.ly/pmt-cc https://bit.ly/pmt-edu https://bit.ly/pmt-cc Why do plants need a good supply of nitrate ions? Nitrate ions are required to convert sugars into proteins which are required for the plant to grow. As a result, the growth of the plant will be stunted if there is not an adequate supply of nitrates. https://bit.ly/pmt-cc https://bit.ly/pmt-edu https://bit.ly/pmt-cc Why do plants need a good supply of magnesium ions? https://bit.ly/pmt-cc https://bit.ly/pmt-edu https://bit.ly/pmt-cc Why do plants need a good supply of magnesium ions? Magnesium ions are required to synthesise chlorophyll, which absorbs light energy during photosynthesis. As a result, the leaves cannot photosynthesise properly and they turn yellow (chlorosis). https://bit.ly/pmt-cc https://bit.ly/pmt-edu https://bit.ly/pmt-cc What are the symptoms of disease in plants? https://bit.ly/pmt-cc https://bit.ly/pmt-edu https://bit.ly/pmt-cc What are the symptoms of disease in plants? Stunted growth (lack of nitrate ions) Spotted leaves (eg. rose black spot fungus) Decay/rotting Growths Malformation of stems/leaves Discolouration Presence of pests https://bit.ly/pmt-cc https://bit.ly/pmt-edu https://bit.ly/pmt-cc What are three ways in which plant disease can be identified? https://bit.ly/pmt-cc https://bit.ly/pmt-edu https://bit.ly/pmt-cc What are three ways in which plant disease can be identified? Reference to a gardening website or manual Laboratory testing Monoclonal antibody test kits https://bit.ly/pmt-cc https://bit.ly/pmt-edu https://bit.ly/pmt-cc Give examples of physical defence responses used by plants https://bit.ly/pmt-cc https://bit.ly/pmt-edu https://bit.ly/pmt-cc Give examples of physical defence responses used by plants Cellulose cell walls Tough waxy cuticle on leaves Outside layer on stems/bark on trees Leaf fall https://bit.ly/pmt-cc https://bit.ly/pmt-edu https://bit.ly/pmt-cc Give examples of chemical defence responses used by plants https://bit.ly/pmt-cc https://bit.ly/pmt-edu https://bit.ly/pmt-cc Give examples of chemical defence responses used by plants Antibacterial chemicals Poisons https://bit.ly/pmt-cc https://bit.ly/pmt-edu https://bit.ly/pmt-cc Give examples of mechanical defence responses used by plants https://bit.ly/pmt-cc https://bit.ly/pmt-edu https://bit.ly/pmt-cc Give examples of mechanical defence responses used by plants Thorns and hairs to deter animals Leaves that droop/curl on contact Mimicry to trick animals https://bit.ly/pmt-cc https://bit.ly/pmt-edu https://bit.ly/pmt-cc