How can we prepare for Bio in the boards? I feel it’s very content heavy and difficult to study for so many chapters

In my opinion, the best way to study bio is to read teh content and get accustomed to it rather than attempting to memorise it or 'mug it up' because that certainly won't help you. Many questions in the exam (even paper 4 the so called theory paper) are application based and instead of knowing the concept you must understand the concept well. I personally was never fond of bio and enjoyed physics and chemistry more but when you start to understand what you need to know, it becomes easier than if you have to memorise the same content. The only thing you should memorise are the definitions. Even though there are only 2-3 definitions asked, you should have these ready at your finger tips because this will not only help you score those marks easily but also save lots of time since biology paper 4 is very time consuming. I believe that doing past papers also helps to an extent because sometimes reading the mark scheme which explains the application of the concept may help you to understand it better which means that you will be able to perform well in your final exams.

If you need help in understanding the content you can always book a doubt clearing session and we can help you based on your needs and preferences.

Hope this helps :)