ATL in Biology
Batch fermentation and continuous culture
Microorganisms are small and grow quickly. There is a huge diversity of them including, bacteria of many sorts, archaebacteria and fungi. They are useful in industry because their metabolism has the capacity...
ATL in Biology
Batch fermentation video questions - model answers
In addition to natural components made by the organism for its own use, describe two other ways which useful products can be produced using the micro-organism’s metabolism. Substances cells have been...
ATL in Biology
Seeds, flowering & phytochromes
How can a pigment change the behaviour of the cells Hint: Click to display some suggestions The pigment must be changed by the light. There might be an active form of the pigment. The active form of the...
ATL in Biology
Gene pools
After consideration of what a gene pool is and the way that evolution causes changes in gene pools this lesson looks at the driving forces of speciation using the examples of Bird of paradise species...
ATL in Biology
Conservation methods
In this activity students research a local example of captive breeding to explore the issues around ex-situ conservation and reintroduction of endangered species. Simple explanatory slides compare in-situ...
ATL in Biology
Transpiration and Xerophytes
This lesson builds on the adaptations of the plant to enable transpiration. The abiotic factors which affect transpiration rates are introduced and students are asked to explain how each adaptation affects...
ATL in Biology
Transport in xylem
This lesson follows on from the introductory lesson on vascular tissues and explores the details of the way water travels through plants and how the xylem is adapted to facilitate this transpiration stream....
ATL in Biology
DNA structure - Extras for HL
This lesson introduces students to nucleosomes, and some of the details of DNA structure which will help to understand DNA replication. This includes the purine and pyrimidines bases as well as 5' and...
ATL in Biology
Describing communities
A theoretical lesson to look at the role of organisms in food webs. Beginning with a short explanation of the roles and limiting factors this activity quickly moves to a model community and a challenge...
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Use provocations - new year resolution Free
IB Biology students (HL) need to be able to draw and annotate diagrams of flowers and seeds. A teacher might bring in some flowers and run quite a descriptive lesson. Students label parts, copy diagrams...