Activities
Model answers - further questions on co-dominant and multiple alleles
This page contains model answers for the activity worksheet Further genetics questions on co-dominant and multiple alleles on this page Theoretical Genetics 2 (2025) See the pdf file below. Model answers...
ATL in Biology
Hairy hands - model answers
By following these worksheets students will see how the theory and experiment bring about these advances in our understanding. Students actively build ideas through experience and reflection. This is...
eBook
C4.2 Transfers of energy - written task
This task has a focus on the concept of transfers of energy and matter between organisms in food chains and food webs. This structured exam-style question is a chance to deduce the answer from the information...
Activities
Application to organisms
This lesson builds on the knowledge of the process of osmosis in different concentrations of solute solutions and introduces the key terminology when describing the impact on animal and plant cells. Medical...
Activities
Classification of organisms (2025)
Classification of organisms is useful and makes sense of the huge diversity of organisms. Difficulties in placing some organisms according to their taxonomic group cause differences of opinion. There...
Blog
Final revision in the northern hemisphere Free
Students in the northern hemisphere will be busy revising this weekend. As part of revision is it useful to practice writing answers. We have put together a selection of ‘written tasks’ to help students...
eBook
D2.1 Cell & nuclear division - written task
This structured extension question is in the style of the IB exam questions. It has a particular focus on the concept of meiosis, the division of the nucleus in eukaryote cells during the cell cycle....
eBook
D1.1 DNA replication - written task SL & HL
This structured extension question is in the style of the IB exam questions.The focus of this question is the role of enzymes in DNA replication. Often in IB exams the process of DNA replication will...
eBook
C4.1 Populations & communities - written task Free
This structured extension question has a focus on the concept of mutualism, an important relationship between two organisms or species. Herbivory, predation, interspecific competition, mutualism, parasitism...
eBook
C3.1 Integration of body systems - written task Free
This structured extension question addresses the control of the heart rate and stroke volume. It uses the "outline" command term. Outline answers are only slightly different from explain or describe. The...