To improve in biology subject at first you need to increase your writing speed. In biology There are many tricky questions. But the answers can be pretty good and lengthy
A very critical chapter of biology is diagrams. Every Students Should Remember to practice all diagrams well. in exams time it will help you a lot.
You Should focus on the chapters like taxonomy that have a lot of information and are a critical part of the book. Memorise all the information that is in these chapters.
Always Remember to choose a good hard black pencil while practicing the diagrams. Use the same pencil during your examination. Carry a good eraser and sharpener in your compass box.