CBSE Class 12 Biology Deleted Syllabus 2025: Check The Deleted Topics Here!

Unit

Title

Marks

VI

Reproduction

16

VII

Genetics and Evolution

20

VIII

Biology and Human Welfare

12

IX

Biotechnology and its Applications

12

X

Ecology and Environment

10

Total

70

Unit-VI Reproduction

Chapter-1 - Whole Chapter Deleted

Unit- VIII Biology And Human Welfare

Chapter-9 - Strategies For Enhancement In Food Production-  Whole Chapter Deleted

Unit-X Ecology and Environment

Chapter 13: Organisms and Populations- Organism and its Environment, Major Abiotic Factors, Responses to Abiotic Factors, Adaptations

Chapter 14: Ecological Succession and Nutrient Cycles

Chapter-16: Whole Chapter Deleted- Environmental Issues Air pollution and its control; water pollution and its control; agrochemicals and their effects; solid waste management; radioactive waste management; greenhouse effect and climate change impact and mitigation; ozone layer depletion; deforestation; any one case study as success story addressing the environmental issue(s). 

List of experiments 

Deleted Topics 

• Collect and study soil from at least two different sites and study them for texture, moisture content, pH and water-holding capacity. Correlate with the kinds of plants found in them. 
• Collect water from two different water bodies around you and study them for pH, clarity and presence of any living organism.
• Study the presence of suspended particulate matter in air at two widely different sites. 
• Study the effect of different temperatures and three different pHs on the activity of salivary amylase on starch. 

List Of Practicals

Deleted Topics 

Study/Observation Of The Following (Spotting)

• Two plants and two animals (models/virtual images) were found in xeric conditions. Comment upon their morphological adaptations.
• Two plants and two animals (models/virtual images) were found in aquatic conditions. Comment upon their morphological adaptations.

Competencies

Demonstrate Knowledge and Understanding

50%

Application of Knowledge / Concepts

30%

Analyse, Evaluate and Create

20%