Do you want an assignment on biology research topics, here in this forum we will discuss biology topics, definitely I am sure if you picking these topics or write on it, you will achieve the first rank in an examination. Only biology subject deals of living organism and their evolution, function ,growth and structure like human growth and structure etc even animals ,birds and sea animals are discussed too. Before selecting a topic follow below guideline:
First thing, It should have a wide or broad topic I mean you can collect data or write-up.
Second thing, It should be interesting topic for your target audience.
Third thing is that it should be easy or will be complete on time.
You can write on Genetics and abortion
Molecular, neurobiology, ecology, bioremediation and animal etc.