PRACTICALS FOR CLASS XII BIOLOGY 2016-17

PRACTICALS FOR CLASS XII BIOLOGY 2016-17

Maximum Marks : 30         60 Periods

A. List of Major 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 quadrate method.

6. Study of plant population frequency by quadrate 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.

9. Isolate DNA from  available plant material spinach , green pea seeds, papaya  etc.

B.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. testis and T.S. 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 colour/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 their morphological adaptations.

11. Plants and animals found in aquatic conditions. Comment upon their morphological adaptations.