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
Homeostasis and Response
Hormones in human reproduction
- 3 things to know
- Biology Paper 2
Overview
Puberty and secondary sex characteristics, oestrogen, testosterone and ovulation, the roles of FSH, LH, oestrogen and progesterone in the menstrual cycle and how they interact, menstruation, and reading hormone graphs for ovulation and pregnancy.
What you need to know
Answer each one before you reveal it.
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Key term
Give two secondary sex characteristics that develop during puberty.
Key term
What is the main female reproductive hormone, and where is it produced?
Questions from this subtopic
Each one with the model answer underneath.
- 1
What do reproductive hormones cause to develop during puberty?
Model answer
The secondary sex characteristics.
- 2
Give two secondary sex characteristics that develop during puberty.
Model answer
The growth of body hair, and a deepening voice in boys or the development of breasts in girls.
- 3
What is the main female reproductive hormone, and where is it produced?
Model answer
Oestrogen, produced in the ovary.
- 4
What is ovulation?
Model answer
The release of a mature egg from an ovary.
- 5
About how often is an egg released from the ovaries?
Model answer
About once every 28 days.
- 6
What is the main male reproductive hormone, and where is it produced?
Model answer
Testosterone, produced by the testes.
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