Activities
Osmoregulation - model answers
These are suggested model answers for the activity ADH & osmoregulation As model answers they don't cover all the possible options for correct responses, but they provide a very good guide for students...
eBook
C3.2 Defence against disease - reading task
If a disease-causing organism, a pathogen, comes into contact with the body it could cause infection and disease. Examples of pathogenic organisms include viruses, bacteria, fungi and protists. The body...
eBook
C2.2 Neural signalling - reading task
Neural signalling occurs when nerve cells, called neurons, transmit electrical impulses along elongated projections of their cells called nerve fibres. Neurons interact with other cells through synapses,...
eBook
C3.1 Integration of body systems - reading task
Reflexes are vital in protecting the body from harm. In this reading task, the reasons for having a reflex arc will be explored in more detail. The components that make up the reflex arc are looked at...
eBook
C4.1 Populations & communities - reading task
In a natural community, there is an interdependent, interacting set of populations of species. The size of each population within the community varies due to numerous biotic and abiotic factors, but for...
Activities
Prokaryote cells (2025)
This activity includes; a full set of resources for teaching about prokaryotes, a student activity sheet, with examiner's hints, a short screencast explaining how to draw a prokaryote cell,flashcards...
ATL in Biology
IB DP Biology - Introduction Free
When beginning to teach IB Biology it is important to do some long term planning. There would be nothing worse than arriving at the mock exams in year 2 finding 100 hours of IB Biology still to teach....
Activities
Activity 3 - Burmese python model answers
The document below shows model answers to the questions on the Burmese python inheritance activity including a test cross found on the page Di-Hybrid Crosses HL (2025) Teachers can control access to...
ATL in Biology
Di-Hybrid Crosses.
This lesson gives students a guided tour of dihybrid genetic crosses using Punnett squares predicting the combination of alleles from two unlinked genes at the same time. The method described provides...
Activities
Sex Linked Genes (2025)
In this activity students read about the inheritance of colour blindness and hemophilia as examples of sex linkage. Then they make structured notes on the essential points using the structured notes worksheet....