Hey!

The chapter wise marks distribution for biology theory exam of class 12th in ISC is as mentioned below:

1. Reproduction -- 16 Marks
2. Genetics and Evolution --15 Marks
3. Biology and Human Welfare -- 14 Marks
4. Biotechnology and its Applications -- 14 Marks
5. Ecology and Environment -- 10 Marks

It makes upto a total of 70 Marks

Hope this answer helps!