Key term
AQA GCSE Combined Science Biology 8464
Bioenergetics
Cell Biology
Topic overviewEukaryotes and prokaryotesAnimal and plant cellsCell specialisation and differentiationMicroscopyChromosomes, mitosis and the cell cycleStem cells in embryos, adults and meristemsTherapeutic cloning, its risks, and cloning plantsDiffusion and the factors affecting its rateSurface area to volume ratio and exchange surfacesOsmosisActive transport
Ecology
Topic overviewLevels of organisation in an ecosystem, and what organisms needCompetition, interdependence and stable communitiesAbiotic factorsBiotic factorsAdaptationsProducers, food chains and sampling with quadrats and transectsPredators, prey and measuring population sizeHow materials are cycledWaste management and biodiversityLand use, deforestation and global warmingMaintaining biodiversity
Homeostasis and Response
Infection and Response
Inheritance, Variation and Evolution
Topic overviewSexual and asexual reproductionMeiosisDNA and the genomeGenetic terms, dominant and recessive allelesPunnett squares, probability and genetic crossesInherited disorders and sex determinationVariationEvolutionSelective breedingWhat genetic engineering is, and what it is used forGM crops, their risks, and the steps of the processEvidence for evolution, and extinctionFossilsResistant bacteriaClassification of living organisms
Organisation
Topic overviewLevels of organisation, and how enzymes workAmylase, proteases and lipasesBile, food tests and the effect of pH on amylaseThe heart, the lungs and double circulationThe pacemaker, the blood vessels and the bloodCoronary heart disease: a non-communicable diseaseHealth issuesRisk factors and causal mechanisms in diseaseSampling, correlation and interpreting risk dataCancerPlant tissues, and transpiration and its rateRoot hair cells, xylem, phloem and stomata
Infection and Response
Fungal and protist diseases
- 3 things to know
- Biology Paper 1
Overview
Rose black spot, its symptoms, spread and treatment with fungicides, and malaria, caused by a protist carried by mosquito vectors, with its fever symptoms and control through mosquito nets and stopping mosquitoes breeding.
What you need to know
Answer each one before you reveal it.
Your recallNot started
Key term
Explain why rose black spot slows the growth of the plant.
Key term
What is meant by a vector?
Questions from this subtopic
Each one with the model answer underneath.
- 1
Which type of pathogen causes rose black spot?
Model answer
A fungus.
- 2
Describe the symptoms of rose black spot.
Model answer
Purple or black spots develop on the leaves, which often turn yellow and drop early.
- 3
Explain why rose black spot slows the growth of the plant.
Model answer
The damaged and lost leaves reduce photosynthesis, so less glucose is available for growth.
- 4
How is rose black spot spread from plant to plant?
Model answer
By water or by wind in the environment.
- 5
Give two ways of treating a rose plant with black spot.
Model answer
Spraying it with a fungicide, and removing and destroying the affected leaves.
- 6
Which type of organism causes malaria?
Model answer
A protist.
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