Key term
AQA GCSE Biology 8461
Bioenergetics
Cell Biology
Topic overviewEukaryotes and prokaryotesAnimal and plant cellsCell specialisation and differentiationMicroscopyGrowing bacteria and aseptic techniqueCalculating bacterial growth, and testing antiseptics and antibioticsChromosomes, 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 cycledDecompositionWaste management and biodiversityLand use, deforestation and global warmingMaintaining biodiversityTrophic levels and pyramids of biomassTransfer of biomassFactors affecting food securityFarming techniques and sustainable fisheriesRole of biotechnology
Homeostasis and Response
Topic overviewHomeostasisThe nervous system and the reflex arcThe structure of the eye and accommodationMyopia, hyperopia and how they are correctedThe brain and the control of body temperatureHuman endocrine systemInsulin, glucagon and diabetesWater and ion loss, and the production of ureaThe kidneys, ADH and treating kidney failureHormones in human reproductionContraceptionPlant hormones and their uses
Infection and Response
Inheritance, Variation and Evolution
Topic overviewSexual and asexual reproductionMeiosisAdvantages and disadvantages of sexual and asexual reproductionDNA and the genomeDNA as a polymer of four nucleotidesGenetic 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 processCloningDarwin, Lamarck and the acceptance of evolutionSpeciationThe understanding of geneticsEvidence 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
Homeostasis and Response
Contraception
- 3 things to know
- Paper 2
Overview
Hormonal and non-hormonal contraception, including oral contraceptives, slow release progesterone by injection, implant or patch, barrier methods, intrauterine devices, spermicides, avoiding intercourse at fertile times and sterilisation, and the advantages and drawbacks of each.
What you need to know
Answer each one before you reveal it.
Your recallNot started
Key term
Into which two groups are methods of contraception divided?
Key term
How does avoiding intercourse at certain times of the cycle reduce the chance of pregnancy?
Questions from this subtopic
Each one with the model answer underneath.
- 1
What is contraception?
Model answer
The use of a method that prevents pregnancy.
- 2
Into which two groups are methods of contraception divided?
Model answer
Hormonal methods and non-hormonal methods.
- 3
How does an oral contraceptive prevent pregnancy?
Model answer
It contains hormones that inhibit the production of FSH, so no eggs mature.
- 4
Name three ways in which slow release progesterone can be given.
Model answer
By injection, by an implant, or as a skin patch.
- 5
What is the effect of slow release progesterone?
Model answer
It inhibits the maturing and the release of eggs for a number of months or years.
- 6
How do barrier methods work, and name two of them.
Model answer
They stop the sperm reaching an egg, and they include condoms and diaphragms.
Other ways to work this
The same content, four other ways.
What is inside Levo
Six ways to work the same material.
Every question in Homeostasis and Response, on a schedule.
Attempt a question from memory, write the correct version, then attempt it again. Levo records the jump between your first attempt and your last, and brings each question back on the day you are due to forget it.
Or £46 a year, about £3.83 a month. Cancel anytime.