CBSE Syllabus for Class 12 Biology
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| Unit | Title | Marks |
| VI | Reproduction | 14 |
| VII | Genetics and Evolution | 18 |
| VIII | Biology and Human Welfare | 14 |
| IX | Biotechnology and its Applications | 10 |
| X | Ecology and Environment | 14 |
| Total | 70 |
False
Chapter 1: Reproduction in Organisms
True
Chapter 2: Sexual Reproduction in Flowering Plants
True
Chapter 3: Human Reproduction
True
Chapter 4: Reproductive Health
True
False
Chapter 5: Principles of Inheritance and Variation
False
Chapter 6: Molecular Basis of Inheritance
: Search for genetic material and DNA as genetic material; Search for genetic material and DNA as genetic material; Search for genetic material and DNA as genetic material; Structure of DNA and RNA; DNA packaging; DNA replication; Central dogma; Transcription, genetic code, translation; Transcription, genetic code, translation; Transcription, genetic code, translation; Transcription, genetic code, translation; Transcription, genetic code, translation; Transcription, genetic code, translation; Transcription, genetic code, translation;
Chapter 7: Evolution
False
False
Chapter 8: Human Health and Diseases
True
Chapter 9: Strategies for Enhancement in Food Production
Improvement in food production : Plant breeding, tissue culture, single cell protein, Biofortification, Apiculature and Animal husbandry.
Chapter 10: Microbes in Human Welfare
False
True
Chapter 11: Biotechnology – Principles and Processes
: Genetic engineering (Recombinant DNA technology).
Chapter 12: Biotechnology and its Application
True
False
Chapter 13: Organisms and Populations
True
Chapter 14: Ecosystem
Chapter 15: Biodiversity and its Conservation
False
Chapter 16: Environmental Issues
True
False
Time allowed:
3 Hours
Hours Max. Marks:
30 Marks
| Evaluation Scheme | |
| One Major Experiment Part A (Expt. No. 5, 6, 8, 9) | 5 Marks |
| One Minor Experiment Part A (Expt. No. 2, 3, 4) | 4 Marks |
| Slide Preparation Part A (Expt. No. 1, 7) | 5 Marks |
| Spotting | 7 Marks |
| Practical Record + Viva Voce | 4 Marks |
| Project Record + Viva Voce | 5 Marks |
| Total | 30 Marks |
A. List of Experiments
- Study pollen germination on a slide.
- Collect and study soft 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 plant population density by quadrat method.
- Study the plant population frequency by quadrat method.
- Prepare a temporary mount of onion root tip to study mitosis.
- Study the effect of different temperatures and three different pH on the activity of salivary amylase on starch.
- Isolate DNA from available plant material such as spinach, green pea seeds, papaya, etc.
B. Study/observation of the following (Spotting)
- Flowers adapted to pollination by different agencies (wind, insects, birds).
- Pollen germination on stigma through a permanent slide.
- Identification of stages of gamete development, i.e., T.S. of testis and T.S. of ovary through permanent slides (from grasshopper! mice)
- Meiosis in onion bud cell, or grasshopper testis through permanent slides.
- T.S. of blastula through permanent slides (Mammalian).
- Mendelian inheritance using seeds of different colour/sizes of any plant.
- Prepared pedigree charts of any one of the genetic traits such as rolling of tongue, blood groups, ear lobes, widows peak and colour blindness.
- Controlled pollination – emasculation, tagging and bagging.
- Common disease causing organisms like Ascaris, Entamoeba, Plasmodium, Roundworm through permanent slides or specimens. Comment on symptoms of diseases that they cause.
- Two plants and two animals (models/virtual images) found in xeric conditions. Comment upon their morphological adaptations.
- Two plants and two animals (models/virtual images) found in aquatic conditions. Comment upon their morphological adaptations.
