BIOLOGY
(Senior Secondary Stage)
Objectives
The curriculum at the senior secondary stage should be disciplinary in its
approach, with appropriate rigour and depth. Care should be taken not to make
the syllabus heavy. The curriculum load should be rationalised to avoid the steep
gradients between secondary and senior secondary syllabus, but this should not
amount to making senior secondary syllabus only a slightly upgraded variant of
secondary stage science. There should be strong emphasis on experiments,
technology and investigative projects. The main objectives are :-
To develop an understanding, based on observation, identification,
classification and illustration drawn from life experiences, and physical,
biological and cultural aspects of life.
To know the facts and principles of Science and its applications consistent
with the stage of cognitive development.
Acquire the skills, and understand the methods and processes that lead to
generation and validation of scientific knowledge.
Relate to the environment (natural environment artifacts and people), local
as well as global and appreciate the issues at the interface of science,
technology and society.
The depth should ensure that the student has a basic, if not rigorous,
understanding of the subject.
The teaching of the theoretical aspects and the experiments based on
them should be closely integrated and dealt together.
EVALUATION
The following evaluation pattern should be followed for the senior
secondary stage :-
1. Recapitulation : Daily version of the previous taught subject matter in the
class.
2. Periodic Tests : Periodic tests should be taken after the completion of
each topic.
3. Regular Home Assignments : Regular Home assignments should be
given from time to time.
4. Written Examination System : Should be in terminal form, i.e.,
i) Ist Terminals will cover 40% of the syllabus.
ii) IInd Terminals will cover 80% of the syllabus.
iii) Annual Exams : Annual examination will cover the whole syllabus.
One practical should be performed in a week for each class.
Expected Outcome
After the completion of senior secondary stage the student will
develop understanding based on observation, illustration and experimentation.
He/She will be able to learn Biology by relating with day today life and expected
to understand Biology better. Scientific vocabulary of the student expands and
scientific temper is inculcated. He/She will be able to under the basic concepts,
principles and laws of Biology. Problem solving and inference making skills will
be developed. He/She will develop analytical skills and will be able to apply the
learnt knowledge in understanding new and nobel situations. The learner will
enjoy to learn the difficult topics with examples from everyday life.
Distribution of Marks
Class XII
Biology (Theory)
Unit Topic Marks
I Physiology of Plants 20
II Physiology of Animals 20
III Genetics of Evolution 20
IV Biology of Human Welfare 10
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TOTAL: 70
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Distribution of Marks
Class XII
Biology (Practicals)
Unit Topic Marks
I Core Experiments 20
II Record of one Investigatory Project
And viva based on the project 5
III Class record and viva based on
experiments 5
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TOTAL: 30
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Class XI
Biology (Practicals)
1. Study of parts of Compound Microscope.
2. Study of specimens and identification with reasons :-
Bacteria, Oscillatoria, Spirogyra, Rhizopus, mushroom, yeast,
Liverworts, moss, fern, Pinus, one monocotyledon, dicotyledon
and lichens.
3. Study of characters of specimens and identification with reasons :-
Amobea, Hydra, Liverfluke, Ascaris, Leech, Earthworm, Prawn,
Silkworm, Honeybee, Snail, Star fish, Shark, Rohu, Frog,
Lizard, Pigeon and Rabbit.
4. (a) To prepare a temporgry mount of onion peel to study cell structure.
(b) Study of mitosis in onion root tep. And animal cell.
5. Study of meosis in onion buds, and testis of grass hopper.
6. Study of guard cells, parenchyma, collenchyma, slerenchyma x-ylem and
phloem through temporary, permanent slides.
7. Study of different modification in root, stem and leaves.
8. Study and identify different types of inflorescences.
9. Study and describe six common flowering plants :
(Solanaceae, Brassicaceae, Fabaceae, Asteraceae, Liliaceae and
Poaceae).
10. Study of T.S. dicot and monocot root and stem through
temporary/permanent slides.
11. Test for starch, sugar, protein and fats from common food materials.
12. Study of squamous epithelium, muscle fibres, nerve cells.
13. Study of external morphology of earthworm, cockroach and frog through
models.
14. Study of different soil samples for texture and moisture content.
15. Study the pH and water holding capacity and correlate with the kinds of
plant found in them.
16. Study plants and animals found in dry conditions. Comment upon on their
adaptations.
17. Collect water from different water bodies around you and study them for
pH, clarify and presence of any living organisms.
18. Study of plant population density by quadrate method.
Class XII
Biology (Practicals)
CORE EXPERIMENTS
1. To study Osmosis by potato osmometer.
2. To study plasmolysis in epidermal peel.
3. To study rate of transpiration in the upper and lower surface of leaves
(comparison).
4. To study the effect of temperature on the permeability of cell membrane
using beet root.
5. To study nitrogen fixing bacteria from root nodules of leguminous plant.
6. To separate plant pigments through paper chromatography.
7. To study pollen germination on a slide.
8. To study the effect of salivary amylase on starch.
9. To study the effect of pH on the activity of salivary amylase.
10.(a) To prepare and study blood smear (Human).
(b) To study of temolysis and crenation in human blood.
11. To test the presence of urea, sugar, bile salts and albumin in urine.
12. To study mammalian cartilage, bone and muscles from prepared slide.
13. To study mammalian cell and T.S. of spinal cord.
14. To study human skeleton and different types of joints.
15. To study spermatogenesis and oogenesis (any stage) in mammals.
16. Preparation of acetocarmine stained onion root tip or another to study
nucleic acids.
INVESTIGATORY PROJECTS
1.(a) Preparation of a three dimensional model of a plant or animal cell.
(b) Preparation of a model of DNA.
2. Determination of the essentiality of minerals for plant growth. Recording of
deficiency symptoms.
3. Study of the effect of light and gravity on plant movement and the role
played by them.
4. Comparative rates of pollen germination of various species in sugar
solution.
5. Study of the effect of gibberellin on germination and shoot elongation.
6. Population survey to identify human phenotypic characters-rolling of
tongue, tasting PTC, fused ear lobes, colour blindness etc.
7. Effect of antibiotics on micro-organisms.
8. Study of frequency of various blood groups in a population.
9. Effect of fertilizers on rate of germination, elongation of hypocotyl and the
length of root.
10. Study of the competition between weeds and crops.
