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Everything that human beings or living animals do is done by protein molecules. And therefore the kind of proteins that one has and therefore the ability one has is determined by the genes that one has.
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5 Oct 2026
Richard Scarr
It is with great sadness that we have to announce the passing of Richard Scarr. He was always an enthusiastic biologist and a dedicated educator. After reading Biology at Kings College in London he taught...
12 Aug 2026
Exam practice questions
Over the summer we have completed a full set of exam practice question pages, one for each topic. These pages are great for homework or revision. The Exam practice concept; The pages all have “exam practice”...
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See all"Incredibly useful resource site - has probably saved me hundreds of hours planning. Plenty of links, worksheets and interactive resources that support the new IB course."
Sarah Jackson
Diocesan School for Girls
"If you are looking for a reliable source to help you plan and teach the new IBDP Biology course, this website is a must."
Mandy Watson
Berlin International School
Subscriber comments
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I am so heartbroken to hear this news. May he rest in peace, and please accept my sincere condolences.
Richard Scarr -
Dear Lauren, I've just posted model answers as you requested for this dichotomous key activity. Of course this is just one possible answer, but it will illustrate the method. I realise the bee shapes and colours are quite tricky.Best...
Biodiversity of species & DNA -
A student wishes to use AI to create a simulation that would generate the data for her Biology IA, rather than collecting data experimentally. Provided that she designs the simulation herself and analyzes the resulting data, would this be an acceptable...
IA official assessment criteria
Elizabeth
The updated Ensembl website no longer lists the length of the genome on the organism's homepage (3099Mbp for humans). If you click on the down arrow to expand the Assembly section, you will see genome length in bp. This feature is not available for...
Genome Projects (2025)