YOUR SUBJECT LESSONS
Biology & life sciences
See inheritance, DNA and observation at work.
- 01Separate the observation from the hypothesis.
- 02Use a diagram to connect cause and consequence.
- 03Compare predictions with evidence and state limits.
FROM PRINCIPLE TO PRACTICE
Lessons in a useful order
From foundations to high school: a mental model, worked example and four exercises with solutions per chapter.
Biology & life sciences
Cells and DNA: levels of organisation
A cell is a unit of life.
Lesson and 4 exercisesBiology & life sciences
Photosynthesis and respiration: matter and energy
Photosynthesis lets chlorophyll-containing organisms make organic matter from CO₂ and water using light energy, releasing oxygen in the school model.
Lesson and 4 exercisesBiology & life sciences
Ecosystems: networks and recycling
An ecosystem links organisms and their physical environment.
Lesson and 4 exercisesBiology & life sciences
Mitosis and meiosis: maintain or reduce
DNA replication creates two chromatids per chromosome.
Lesson and 4 exercisesBiology & life sciences
Scientific experiments: control and conclusion
Experiments test hypotheses by comparing conditions.
Lesson and 4 exercisesBiology & life sciences
Inheritance: gametes and probability
In a simple diploid model, an individual has two alleles at a locus and each gamete receives one.
Lesson and 4 exercisesBiology & life sciences
Gene expression: DNA, RNA, protein
Transcription makes RNA from a DNA template strand.
Lesson and 4 exercisesBiology & life sciences
Immunity: recognise, respond, remember
Innate immunity uses barriers, cells and receptors recognising microbial or damage-associated patterns.
Lesson and 4 exercisesBiology & life sciences
Plate tectonics: read the evidence
Lithospheric plates move relative to their neighbours.
Lesson and 4 exercisesBiology & life sciences
Evolution: populations and selection
Evolution changes allele frequencies in populations across generations.
Lesson and 4 exercisesBiology & life sciences
Earth and climate: stocks, flows, evidence
A reservoir holds an amount; a flow transfers matter or energy per unit time.
Lesson and 4 exercisesBiology & life sciences
Nerve signals: pathway and coding
A neuron transmits electrical signals along its membrane.
Lesson and 4 exercisesFurther reading
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