Research paper in biology

I am writing a biology research paper. My topic is related to organs transplantation (current issues, ethical problems etc). I have written a draft and showed it to my professor. She was satisfied with the content and research, but she told that I need to work on my writing. According to her I didn't follow the structure, but I have no idea how am I supposed to build my research paper. Can somebody give me suggestions or recommend me articles about research paper writing??? please!!

There are many articles online about research paper writing. You can google this question))

I did google this question! There are many articles on this topic, but I need one with better explanations) Can you recommend me at least one?

In this case read similar papers to your research, and try to induce the structure...

Have a look at some samples..

http://ec.europa.eu/health/ph_threats/human_substance/oc_organs/consultation_paper.pdf

https://bioethicsarchive.georgetown.edu/pcbe/background/staff_cohen.html

http://cogprints.org/8083/1/Organ%20transplants.pdf

I did not read any of the papers but hopefully the help and they might be useful in as references...

It is a good idea to compare your paper with other papers. It will take time, but I am sure it is worth it!

In this case read similar papers to your research, and try to induce the structure...

Have a look at some samples..

http://ec.europa.eu/health/ph_threats/human_substance/oc_organs/consultation_paper.pdf

https://bioethicsarchive.georgetown.edu/pcbe/background/staff_cohen.html

http://cogprints.org/8083/1/Organ%20transplants.pdf

I did not read any of the papers but hopefully they help and they might be useful as references...

In my opinion, this one is good:
http://blog.pro-papers.com/how-to-write-an-academic-research-paper/
It also includes a video-lecture. If it helps let me know))