CBSE syllabus reduced by 30%: Check deleted syllabus of CBSE Class 12
Learn about the deleted topics of CBSE Class 12th Biology Syllabus 2020-21. In this article, you will also find links to access revised CBSE 11th Biology Syllabus 2020-21
Human Resource and Development Minister Ramesh Pokhriyal ‘Nishank’ announced a major reduction in CBSE syllabus 2020-21 by 30 per cent. The Central Board of Secondary Education (CBSE) slashed 30 per cent of the syllabus for the year 2020-21 for classes 9 to 12 because of the reduction in classroom teaching time due to the COVID-19 pandemic and lockdown
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Download class 12 Biology 2020-21 revised syllabus here
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Under Unit-VI Reproduction
Chapter-1: Reproduction in Organism
Reproduction, a characteristic feature of all organisms for continuation of species; modes of reproduction – asexual and sexual reproduction; asexual reproduction – binary fission, sporulation, budding, gemmule formation, fragmentation; vegetative propagation in plants
Under Unit-VII Genetics and Evolution
Origin of life; biological evolution and evidences for biological evolution(paleontology, comparative anatomy, embryology and molecular evidences); Darwin’s contribution, modern synthetic theory of evolution; mechanism of evolution – variation (mutation and recombination) and natural selection with examples, types of natural selection; Gene flow and genetic drift; Hardy – Weinberg’s principle; adaptive radiation; human evolution.
Under Unit-VIII Biology and Human Welfare
Chapter 9: Strategies for Enhancement in Food Production
Animal husbandry, Plant breeding, tissue culture, single cell protein.
Under Unit-X Ecology and Environment
Ecosystems: Patterns, components; productivity and decomposition; energy· flow; pyramids of number, biomass, energy; nutrient cycles (carbon and phosphorous); ecological succession; ecological services – carbon fixation, pollination, seed dispersal, oxygen release (in brief).
Chapter 16: Environmental Issues
Air pollution and its control; water pollution and its control; agrochemicals and their effects; solid waste management; radioactive waste management; greenhouse effect and climate change impact and mitigation; ozone layer depletion; deforestation; exemplifying case study as success story addressing environmental issue(s).
DELETED PORTIONS CLASS XII: PRACTICAL
A: List of Experiments
1. Study the presence of suspended particulate matter in air at two widely different sites.
2. Study the plant population density by quadrat method.
3. Study the plant population frequency by quadrat method.
B. Study/Observer of the following (spotting)
1. Pollen germination on stigma through a permanent slide or scanning electron micrograph.
2. Mendelian inheritance using seeds of different colour/sizes of any plant.
3. Controlled pollination – emasculation, tagging and bagging.
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