International A Level Biology / Environment and climate change

Core practical 12: temperature and the development of organisms revision notes

Edexcel International A Level Biology (YBI11), chapter 16: Environment and climate change, specification point 5.22. Part of the full course.

Watch the video lesson · International A Level Biology past papers

This practical tests how temperature affects brine shrimp egg hatching. You compare the percentage that hatch over time, then use the results to calculate hatching rates and Q₁₀ while keeping the organisms’ welfare in mind.

More lessons in Environment and climate change

• Energy transfer between trophic levels
• Gross and net primary productivity
• The carbon cycle
• Using the carbon cycle to reduce atmospheric CO₂
• The greenhouse effect and anthropogenic climate change
• Evidence for climate change: CO2 and temperature records
• Evidence for climate change: pollen in peat bogs and dendrochronology
• The climate debate: correlation, causation and who concludes
• Extrapolating data: climate models and their limitations
• How climate change affects plants and animals
• Temperature, enzymes and Q10
• Evolution: a change in allele frequency
• Allopatric and sympatric speciation