What is the challenging part about reading an AP Bio Textbook and taking note at the same time?

What would it be like to take notes on chapters in an AP Bio Textbook. Be specific.What is the challenging part about reading an AP Bio Textbook and taking note at the same time?
It has been scientifically proven that humans cannot read and pay attention at the same time therefore just focus on one paying attention or taking notes which ever one your better at.In an AP class you should mostly pay attention and just write down facts you know you are going to use.What is the challenging part about reading an AP Bio Textbook and taking note at the same time?
Well i have AP bio and it is this huge fat book. It is the biggest text book i have ever had. but its kinda boring

What do you mean by what would it be like???????

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