hey,

the syllabus with weightage of biology for the NEET exam 2020 are as follows

1. diversity in living world - 14%

2. structural organization in animals and plants - 5%

3. cell structure and function - 9%

4. plant physiology- 6%

5. human physiology - 20%

6. reproduction - 9%

7. genetics and evolution - 18%

8. biology and human welfare - 9%

9. biotechnology and its applications - 4%

10. ecology and environment - 6%

and the important topics for the biology section are reproduction,human physiology, diversity in living organisms, genetics and evolution etc

hope this helps!