I received a comment on my blog! Here is my answer to her question. Please feel free to add more resources.
We are getting more and more IB Biology textbooks on the market and maybe it would be a good thing to make a check list starting with the best ones:
Based on the new syllabus.
More than a textbook.
An excellent IB Biology study guide.
#4: Biology by Rita Ghalayini.
She has everything.
Nice diagrams, and a lot a questions to prepare students for Paper 2.