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CBSE Class 10 Syllabus Biology

Biology, Class 10 CBSE

The subject of Biology plays an important role in developing well-defined abilities in cognitive, affective and psychomotor domains in children. It augments the spirit of enquiry, creativity, objectivity and aesthetic sensibility.

Upper primary stage demands that a number of opportunities should be provided to the students to engage them with the processes of Science like observing, recording observations, drawing, tabulation, plotting graphs, etc., whereas the secondary stage also expects abstraction and quantitative reasoning to occupy a more central place in the teaching and learning of Biology.

General Instructions:
  • There will be an Annual examination based on entire syllabus.
  • The annual examination will be of 80 marks and 20 marks weightage shall be for internal assessment.
  • Out of 80 marks annual examination 68 marks weightage shall be for theory and 12 marks weightage shall be for practical based questions.
  • For internal assessment
    1. There will be three periodic tests conducted by the school. Average of the best two tests to be taken that will have a weightage of 10 marks towards the final result.
    2. Practical / Laboratory work should be done throughout the year and the student should maintain record of the same. Practical Assessment should be continuous. There will be weightage of 5 marks towards the final result. All practical listed in the syllabus must be completed.
    3. Regularity, class work and home assignment completion along with neatness and upkeep of notebook will carry a weightage of 5 marks towards the final results.
Course Structure Class X

Annual Examination – Marks: 80

Unit No.UnitMarks
I (Chemistry)Chemical Substances-Nature and behavior25
II (Biology)World of Living23
III (Physics)Natural Phenomena12
IV (Physics)Effects of Current13
V (Biology)Natural Resources07
Total 80
Internal assessment 20
Grand Total 100
Note: Above weightage includes the weightage of questions based on practical skills.
Unit II: World of Living

Life processes: ‘Living Being’. Basic concept of nutrition, respiration, transport and excretion in plants and animals.

Control and co-ordination in animals and plants: Tropic movements in plants; Introduction of plant hormones; Control and co-ordination in animals: Nervous system; Voluntary, involuntary and reflex action; Chemical co-ordination: animal hormones.

Reproduction: Reproduction in animals and plants (asexual and sexual) reproductive health-need and methods of family planning. Safe sex vs HIV/AIDS. Child bearing and women’s health.

Heredity and Evolution: Heredity; Mendel’s contribution- Laws for inheritance of traits: Sex determination: brief introduction; Basic concepts of evolution.

Unit IV: Our Environment

Natural resources: Air, Water, Soil. Air for respiration, for combustion, for moderating temperatures; movements of air and its role in bringing rains across India. Air, water and soil pollution (brief introduction). Holes in ozone layer and the probable damages. Bio-geo chemical cycles in nature: Water, Oxygen, Carbon and Nitrogen.

Unit V: Natural Resources

Our environment: Eco-system, Environmental problems, Ozone depletion, waste production and their solutions. Biodegradable and non-biodegradable substances.

Management of natural resources: Conservation and judicious use of natural resources. Forest and wild life; Coal and Petroleum conservation. Examples of people’s participation for conservation of natural resources. Big dams: advantages and limitations; alternatives, if any. Water harvesting. Sustainability of natural resources.

List Of Experiments
  1. Preparing a temporary mount of a leaf peel to show stomata.
  2. Experimentally show that carbon dioxide is given out during respiration.
  3. Studying (a) binary fission in Amoeba, and (b) budding in yeast and Hydra with the help of prepared slides.
  4. Identification of the different parts of an embryo of a dicot seed (Pea, gram or red kidney bean).
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