Writing practical notebooks and drawing figures is very difficult. Looking at the picture shared by you, it is clear that this is a practical notebook of biology. I have completed my graduation in Zoology so I know that studying this subject requires preparing a lot of practical notebooks. Which is undoubtedly much more difficult. There is nothing more joyful than having all the questions simple and easy in the exam hall. Answered all the questions from the teachers correctly in Viva Board means your exam preparation was extremely good. Best wishes to you.