Maharashtra 12th Biology Practical Book Solutions [ HSC ]
A. List of experiments to be performed
1. Study of osmosis by potato osmoscope.
2. Study of plasmolysis in epidermal peels.
3. Study of structure and distribution of stomata on upper and lower surfaces of leaf.
4. Study of pollen germination on slide.
5. Study of soil samples at least from two different localities/ sites with respect to their texture and pH and correlate plants found thereof.
6. Study of suspended particulate matter in air at the two widely different sites, in your
area.
7. Study of water samples collected from different water bodies for their pH, clarity and presence of living organisms (microscopic/ planktonic).
8. Study of population density and frequency of different plant populations, by quadrat
method.
9. Isolation of DNA from given sample.
10. Dissect and display floral whorls. Dissect anther and take T. S. or V. S. of ovary to show pollen grains and locules of ovary, respectively.
11. To study wing shape and eye colour in Drosophila.
12. To examine the presence or absence of Barr body in the given sample.
13. Detection of commonly used adulterants in milk.
14. To detect the presence of starch, added as an adulterant to the milk.
15. To study various syndromes and their karyotypes in human beings.
2. Study of plasmolysis in epidermal peels.
3. Study of structure and distribution of stomata on upper and lower surfaces of leaf.
4. Study of pollen germination on slide.
5. Study of soil samples at least from two different localities/ sites with respect to their texture and pH and correlate plants found thereof.
6. Study of suspended particulate matter in air at the two widely different sites, in your
area.
7. Study of water samples collected from different water bodies for their pH, clarity and presence of living organisms (microscopic/ planktonic).
8. Study of population density and frequency of different plant populations, by quadrat
method.
9. Isolation of DNA from given sample.
10. Dissect and display floral whorls. Dissect anther and take T. S. or V. S. of ovary to show pollen grains and locules of ovary, respectively.
11. To study wing shape and eye colour in Drosophila.
12. To examine the presence or absence of Barr body in the given sample.
13. Detection of commonly used adulterants in milk.
14. To detect the presence of starch, added as an adulterant to the milk.
15. To study various syndromes and their karyotypes in human beings.
B. Demonstration experiments (Spotting)
1. Comparative study of rates of transpiration in the upper and lower surfaces of leaf, using four- leaf experiment.
2. Separation of plant pigments by paper chromatography.
3. Study of imbibition by using dried seeds/raisins.
4. Study of flowers adapted to pollination by different pollinating agencies (Wind and Insects)
5. Study of V. S. of anatropus ovule through a permanent slide/ relevant chart.
6. Study of T. S. testis, T. S. ovary and V. S. of blastula, through permanent slides.
7. Study of meiosis in onion flower bud with the help of permanent slides.
8. Study of plants found in xerophytic and aquatic conditions/ habitats. And comment on their adaptations.
9. Demonstration of hybridization technique.
10. To study the prepared pedigree charts of genetic traits such as rolling of tongue, widow's
peak, blood groups and colour blindness.
11. Study of morphological adaptations of animals, found in xeric and aquatic conditions or
habitats.
12. To identify common disease causing organisms like Plasmodium, Entamoeba, Ascaris and Ringworm with the help of permanent slides and or specimens. Comment on symptoms of diseases that they cause.
13. Study of structure or parts of human eye, ear and brain with the help of models or charts.
14. Observe the prepared slide of blood smear to identify different types of blood cells.
2. Separation of plant pigments by paper chromatography.
3. Study of imbibition by using dried seeds/raisins.
4. Study of flowers adapted to pollination by different pollinating agencies (Wind and Insects)
5. Study of V. S. of anatropus ovule through a permanent slide/ relevant chart.
6. Study of T. S. testis, T. S. ovary and V. S. of blastula, through permanent slides.
7. Study of meiosis in onion flower bud with the help of permanent slides.
8. Study of plants found in xerophytic and aquatic conditions/ habitats. And comment on their adaptations.
9. Demonstration of hybridization technique.
10. To study the prepared pedigree charts of genetic traits such as rolling of tongue, widow's
peak, blood groups and colour blindness.
11. Study of morphological adaptations of animals, found in xeric and aquatic conditions or
habitats.
12. To identify common disease causing organisms like Plasmodium, Entamoeba, Ascaris and Ringworm with the help of permanent slides and or specimens. Comment on symptoms of diseases that they cause.
13. Study of structure or parts of human eye, ear and brain with the help of models or charts.
14. Observe the prepared slide of blood smear to identify different types of blood cells.
