CBSE Class 12 Biology practical exam tips and tricks
Biology that deals with the study of the living world and living organisms wouldn't be complete without practical classes. Whether you want to become a doctor or biotechnologist or simple ace your exams, remember to prepare for your Biology practical exams in addition to your preparation for Biology theory exams. Here are some tips !
Biology practical syllabus
Evaluation scheme Maximum Marks: 30
One major experiment 5
One minor experiment 4
Slide preparation 5
Spotting 7
Practical record + viva voce 4
Project record + viva voce 5
Total 30 marks
Evaluation scheme Maximum Marks: 30
One major experiment 5
One minor experiment 4
Slide preparation 5
Spotting 7
Practical record + viva voce 4
Project record + viva voce 5
Total 30 marks
List of Experiments
1. Study pollen germination on a slide.
2. Collect and study soil from at least two different sites and study them for texture,
moisture content, pH and water holding capacity of soil. Correlate with the kinds of
plants found in them.
3. Collect water from two different water bodies around you and study them for pH,
clarity and presence of any living organisms.
4. Study the presence of suspended particulate matter in air at two widely different
sites.
5. Study of plant population density by quadrat method.
6. Study of plant population frequency by quadrat method.
7. Prepare a temporary mount of onion root tip to study mitosis.
8. Study the effect of different temperatures and three different pH on the activity of
salivary amylase on starch.
1. Study pollen germination on a slide.
2. Collect and study soil from at least two different sites and study them for texture,
moisture content, pH and water holding capacity of soil. Correlate with the kinds of
plants found in them.
3. Collect water from two different water bodies around you and study them for pH,
clarity and presence of any living organisms.
4. Study the presence of suspended particulate matter in air at two widely different
sites.
5. Study of plant population density by quadrat method.
6. Study of plant population frequency by quadrat method.
7. Prepare a temporary mount of onion root tip to study mitosis.
8. Study the effect of different temperatures and three different pH on the activity of
salivary amylase on starch.
Study/observation of the following (Spotting)
1. Flowers adapted to pollination by different agencies (wind, insect).
2. Pollen germination on stigma through a permanent slide.
3. Identification of stages of gamete development i.e. T.S. of testis and T.S. of ovary through permanent slides (from any mammal).
4. Meiosis in onion bud cell or grasshopper testis through permanent slides.
5. T.S. of blastula through permanent slides.
6. Mendelian inheritance using seeds of different colours/sizes of any plant.
7. Study prepared pedigree charts of any one of the genetic traits such as rolling of tongue, blood groups, ear lobes, widow's peak and colour blindness.
8. Exercise on controlled pollination - emasculation, tagging and bagging.
9. Identification of common disease causing organisms like Ascaris, Entamoeba, Plasmodium, ringworm through permanent slides or specimens. Comment on symptoms of disease that they cause.
10. Two plants and two animals found in xeric conditions. Comment upon the morphological adaptations.
11. Plants and animals are found in aquatic conditions. Comment upon their morphological adaptations.
Tips
- Study the Biology theory that will form the basis of your experiments thoroughly
- The key to scoring high marks during a Biology practical exam is diagrams. Study from diagrams, revise from diagrams and practice drawing diagrams
- Spotting section can be scoring if you are familiar with the diagrams
- Knowing how to make correct sides is very important
- Understand the syllabus comprehensively so in each experiment/spotting you know what is to be done
- Make a quick revision list for Biology practical preparation to revise the important points and concepts you need to know
- Group study is helpful while preparing, each friend can describe an experiment while others try to identify the concept used in the experiment
- Note down your experiment procedure carefully, many students lose marks while writing the project notes in a hurry
1. Flowers adapted to pollination by different agencies (wind, insect).
2. Pollen germination on stigma through a permanent slide.
3. Identification of stages of gamete development i.e. T.S. of testis and T.S. of ovary through permanent slides (from any mammal).
4. Meiosis in onion bud cell or grasshopper testis through permanent slides.
5. T.S. of blastula through permanent slides.
6. Mendelian inheritance using seeds of different colours/sizes of any plant.
7. Study prepared pedigree charts of any one of the genetic traits such as rolling of tongue, blood groups, ear lobes, widow's peak and colour blindness.
8. Exercise on controlled pollination - emasculation, tagging and bagging.
9. Identification of common disease causing organisms like Ascaris, Entamoeba, Plasmodium, ringworm through permanent slides or specimens. Comment on symptoms of disease that they cause.
10. Two plants and two animals found in xeric conditions. Comment upon the morphological adaptations.
11. Plants and animals are found in aquatic conditions. Comment upon their morphological adaptations.
Tips
- Study the Biology theory that will form the basis of your experiments thoroughly
- The key to scoring high marks during a Biology practical exam is diagrams. Study from diagrams, revise from diagrams and practice drawing diagrams
- Spotting section can be scoring if you are familiar with the diagrams
- Knowing how to make correct sides is very important
- Understand the syllabus comprehensively so in each experiment/spotting you know what is to be done
- Make a quick revision list for Biology practical preparation to revise the important points and concepts you need to know
- Group study is helpful while preparing, each friend can describe an experiment while others try to identify the concept used in the experiment
- Note down your experiment procedure carefully, many students lose marks while writing the project notes in a hurry
Although the Biology practical exam may seem easy, it's important to devote some time to prepare, to help you score high in the overall Biology subject; theory and practical combined.
No comments