Hey Tushar
Following is the weightage trend from Karnataka CET. You can have a look. Hope this information helps you.

Neural Control and Co-ordination 5
Photosynthesis in Higher Plants 5
Respiration in Plants 5
Plant Growth and Development 5
Biomolecules 5
Plant Kingdom 5
Cell Cycle and Cell Division 5
Body fluids and Circulation 4
Morphology of Flowering Plants 4
Anatomy and Flowering Plants 4
Locomotion and Movement 4
Breathing and Exchange of Gases 3
Living World 3
Excretory Products and their Elimination 3
Digestion and Absorption 3
Biological Classification 2


Human Reproduction 7
Microbes in Human Welfare 6
Biotech: Principles and Processes 6
Organism and Population 6
Ecosystem 6
Environmental Issues 6
Biotech: Application 5
Reproduction in Organisms 5
Reproductive Health 5
Evolution 5
Biodiversity and Conservation 4