ATL in Biology
Mitosis and the Cell Cycle Free
Mitosis is a miraculous process. In the making of the three trillion cells of our bodies it manages to faithfully replicate and share the chromosomes equally between all the daughter cells. This lesson...
Activities
Control of cell cycle & cancer HL (2025)
Cell proliferation is vital to the growth and development of organisms, as well as for repair of damaged tissues. It involves cell division and growth, essentially the cell cycle. The control of the cell...
Activities
Meiosis - model answers
Below are model answers for the worksheet Students' Worksheet - meiosis and variation on page Introduction to Meiosis (2025) Please remember these are model answers, not a mark scheme and so other correct...
ATL in Biology
Useful chemicals for IB Biology Free
Every biology laboratory will need a supply of chemicals to support the practical program. Of course, many chemicals can be shared between the chemistry and biology sections. This list is not exhaustive...
Activities
Meiosis quick quiz - model answers
This page shows suggestions of model answers for the activities page Introduction to Meiosis (2025) These are suggestions and so other wordings might also be correct answers.Access to this page is filtered...
Activities
Mitotic index HL - model answers (2025)
The document below shows some suggestions for answers to the activity questions Identifying the stages of mitosis student sheet. on the page Mitotic index & cancer Of course there are other possible answers...
Activities
Compartmentalization - model answers
These are suggested model answers for the short IB style questions in Activity 3 - Separating incompatible functions for the Separating incompatible functions IB style questions in the page Compartmentalization...
Activities
Introduction to Meiosis (2025)
Students begin by sorting cards to outline the process of meiosis, including pairing of homologous chromosomes and crossing over, followed by two divisions, resulting in four haploid cells. Online flashcards,...
Activities
Cancer cell cycle - model answers (2025)
These model answers are for the task Cancer and cell cycle student worksheet in the Activity 2: Understand the cell cycle, tumours and cancer on the page Control of cell cycle & cancer HL (2025) The...
Activities
Identifying stages of mitosis - model answers (2025)
The document below shows some suggestions for answers to the activity questions on Identifying the stages of mitosis student sheet. the page Mitosis and the Cell Cycle (2025) Of course there are other...