Activities
The human heart HL (2025)
This series of activities explores the structure and function of the human heart. First, the circulatory systems of fish and mammals are compared. Then the structures of the human heart and the stages...
Activities
The human heart HL - model answers
These are suggested model answers for the activity Cardiac structure and cycle worksheet on the page The human heart HL (2025) As model answers they don't cover all the possible options for correct responses,...
Activities
Specialisation - video model answers
This series of videos explains the research on Drosophila flies which led to an understanding of the way that concentration gradients of gene transcription factors can switch on genes and lead to specialisation...
Activities
Reclassifying using DNA, cladistics & rRNA (2025)
In this lesson students first try to make a cladogram using the physical appearance of flowers from the figwort family. This illustrates how classification has been done for many years. In the second...
Activities
Cladgram of figwort family - model answers
Characteristic Plantain Snapdragon Figwort Buddleja Foxglove Monkey flower Lopseed Speedwell 2 upper lobes 3 lower lobes Petals form a tube 4 or 5 sepals(not visible in the photos on the worksheet but...
Activities
Virus origins & evolution (2025)
This activity covers the evolution of viruses and the interesting hypothesis that they have all arrived at an obligate parasite lifestyle from a range of different origins. This might well be a great...
eBook
A3.2 Classification & cladistics - student friendly syllabus
Blue text shows extra clarification or guidance. Guiding questions Observing the morphology of species has long been very important in identification of organisms and their classification into groups...
Activities
Intro to cladistics (2025)
What is a clade? How can we explain analogous and homologous traits using cladograms? What do we need to know about cladograms? All these important questions are covered in this lesson plan using a variety...
Activities
Transport in plants - model answers
These are suggested model answers for the activity Drawing root and stems of plants from micrographs on the page Transport in plants (2025). As model answers they don't cover all the possible options...
Activities
Transport in plants (2025)
The transportation of water through the xylem vessels of a plant is considered in this series of activities. The process of transpiration is explored and the continuous column of water due to the cohesion...