If you want to pursue your studies along the various streams of life sciences like medical, then you definitely need biology in your 12^th standard. There is a common opinion that biology is very difficult to understand and it has to be only memorized. But biology is very simple and easy to understand. If you have PCMB in your 12^th standard mark sheet, then gates for both medical and non-medical streams will open up wide for you. It is not very difficult to manage PCMB together if you understand what you read and why you read. If on an occasion, the medical gates didn’t open for you, you will still be left out with various non-medical options to pursue. The key to success is planning ahead and successful implementation of the plan.

Download CBSE 2010 Class Xll Biology Sample Papers
• Biology Sample Paper 1
• Biology Sample Paper 2
• Biology Sample Paper 3
• Biology Sample Paper 4
• Biology Sample Paper 5

CBSE Syllabus Class 12 for 2010: Biology

Biology: CBSE syllabus class 12 for March 2010 examinations.

COURSE STRUCTURE
Class XII BIOLOGY
One Paper Time: 3 Hours Marks: 70

Unit – Marks

1. Sexual reproduction - 12

2. Genetics and evolution -20

3. Biology and human Welfare -12

4. Biotechnology and its applications -12

5. Ecology and environment -14

TOTAL -70

I SEXUAL REPRODUCTION (35 Periods)

Pollination and fertilization in flowering plants. Development of seeds and fruits.
Human reproduction: reproductive system in male and female, menstrual cycle. Production of gametes, fertilization, implantation, embryo development, pregnancy and parturition. Reproductive health - birth control, contraception and sexually transmitted diseases.

II GENETICS AND EVOLUTION (45 Periods)

Mendelian inheritance. Chromosome theory of inheritance, deviations from Mendelian ratio (gene interaction- Incomplete dominance, co-dominance, complementary genes, multiple alleles). Sex determination in human beings: XX, XY. Linkage and crossing over. Inheritance pattern of haemophilia and blood groups in human beings. DNA: replication, transcription, translation. Gene expression and regulation. Genome and Human Genome Project. DNA fingerprinting. Evolution: Theories and evidences.

III BIOLOGY AND HUMAN WELFARE (35 Periods)

Animal husbandry.
Basic concepts of immunology, vaccines.
Pathogens, Parasites.
Plant breeding, tissue culture, food production.
Microbes in household food processing, industrial production, sewage treatment and energy generation.
Cancer and AIDS.
Adolescence and drug/alcohol abuse.

IV BIOTECHNOLOGY AND ITS APPLICATIONS (30 Periods)

Recombinant DNA technology.
Applications in Health, Agriculture and Industry
Genetically modified (GM) organisms; biosafety issues.
Insulin and Bt cotton

V ECOLOGY & ENVIRONMENT (35 Periods)

Ecosystems: components, types and energy flow.
Species, population and community.
Ecological adaptations.
Centers of diversity and conservation of biodiversity, National parks and sanctuaries.
Environmental issues.