Biology

CBSE - 12th Class

Biology 12th is one of the scoring subjects having a lot of amazing facts in it. Apart from being an essential subject in the science group, one can score good marks in biology 12th. This would help them to get placed in good medical institutions.


Biology 12 syllabus for the academic year 2021-22 contains five units in total - unit 6, 7, 8, 9, and 10. Unit 6 is the chapter on reproduction. The number of periods allotted to it is 30, and the total marks carried by this unit are 14. Unit 7 contains the chapter on genetics and evolution. The marks credited to this unit are 18, and the periods allotted to these particular titles are 40 as per as CBSE syllabus for class 12 biology. Biology and Human welfare is the title of unit 8. The curriculum has provided 30 periods for this unit. The number allotted to the section is 14, according to the CBSE class 12 biology syllabus. Unit 9 contains a chapter about biotechnology and its applications. The total number of periods allotted for this unit is 30, and the marks provided for these titles are 10. The last unit or unit 10 is based on ecology and environment. This unit contains 14 marks and has been allotted 30 periods in total. Summing up every unit from the biology class 12 syllabus, the total number of periods is 160, and the total marks for the subject are 70.

CBSE Class 12 Biology Syllabus:



There is a sum of 4 units in class 12 Biology Syllabus of CBSE Which has Chapter name is given below.

The Chapter are mentioned below:

The Chapter include (Chapter-wise):

Unit VI: Reproduction

CHAPTER 01
Reproduction in Organisms.
CHAPTER 02
Sexual Reproduction in Flowering Plants
CHAPTER 03
Human Reproduction
CHAPTER 04
Reproductive Health

Unit VII: Genetics and Evolution

CHAPTER 05
Principles of Inheritance and Variation
CHAPTER 06
Molecular Basis of Inheritance
CHAPTER 07
Evolution

Unit VIII: Biology and Human Welfare

CHAPTER 08
Human Health and Diseases
CHAPTER 09
Strategies for Enhancement in Food Production
CHAPTER 10
Microbes in Human Welfare

Unit IX. Biotechnology and Its Applications

CHAPTER 11
Biotechnology Principles and Processes
CHAPTER 12
Biotechnology and its Application

Unit X: Ecology and Environment

CHAPTER 13
Organisms and Populations
CHAPTER 14
Ecosystem
CHAPTER 15
Biodiversity and its Conservation
CHAPTER 16
Environmental Issues

Unit VI: Reproduction

Chapter 01 : Reproduction in Organisms



Reproduction

  • A characteristic feature of all organisms for continuation of species

  • Modes of Reproduction

  • Asexual reproduction

  • Sexual reproduction

  • Asexual reproduction

  • Modes-Binary fission

  • Sporulation

  • Budding

  • Gemmule

  • Fragmentation

  • vegetative propagation in plants


Chapter 02 : Sexually Reproduction in Flowering Plants



In this chapter, students will get a piece of in-depth knowledge about flower structure in plants. The chapter also highlights the development of male and female reproductive parts. Students will also get to know about the different kinds of pollination. Apart from these, the chapter also highlights the significance of seed dispersal.


Chapter 03 : Human Reproduction



In this Chapter ,Human reproduction is any form of sexual reproduction resulting in human fertilization. It typically involves sexual intercourse between a man and a woman. During sexual intercourse, the interaction between the male and female reproductive systems results in fertilization of the woman's ovum by the man's sperm.


Chapter 04 : Reproductive Health



The students in the chapter get to know about reproductive health and how to prevent sexually transmitted diseases. The chapter also discusses infertility and assisted reproductive technologies like IVF, GIFT, and ZIFT.


Unit VII: Genetics and Evolution

Chapter 05 : Principles of Inheritance & Variation



The chapter talks about inheritance and variation in human beings. Students also get to know about sex determination in human beings, birds etc.


Chapter 06 : Molecular Basis of Inheritance



The chapter discusses genetic material and DNA. Students also get a clear concept about the structure of DNA and RNA. Apart from this, the chapter also discusses DNA packaging, DNA replication and central dogma.


Chapter 07 : Evolution



Evolution is change in the heritable characteristics of biological populations over successive generations. These characteristics are the expressions of genes that are passed on from parent to offspring during reproduction.


Unit VIII: Biology and Human Welfare

Chapter 08 : Human Health & Diseases



Students, upon reading this chapter, get to know about pathogens, parasites that cause human disease. The chapter also provides solutions to prevent the disease from parasites. Apart from these, the chapter also explains the basic concept of Immunology in 12th biology syllabus.


Chapter 09 : Strategies for Enhancement in Food Production



Improvement in food production

  • Plant breeding

  • Tissue culture

  • Single cell protein

  • Biofortification

  • Apiculature

  • Animal husbandry


Chapter 10 : Microbes in Human Welfare



The chapter highlights microbes in human welfare that are microbes in food processing, sewage treatment and bio-fertilizer. The chapter briefly explains antibiotics and their reductions and usage.


Unit IX: Biotechnology and Its Application

Chapter 11 : Biotechnology Principles & Processes



Genetic engineering (Recombinant DNA technology).


Chapter 12 : Biotechnology and Its Applications



The chapter gave a brief explanation about biotechnology application in the health as well as the agricultural sector. One, upon reading the paper, gets an in-depth knowledge about insulin and vaccine production. Other concepts covered in the chapter are stem cell technology, gene therapy and genetically modified organisms.


Unit X: Ecology and Environment

Chapter 13 : Organisms and Populations



Organisms and environment: The topics covered in this chapter are habitat and niche population and ecological adoption. Students also know about various kinds of population interaction like mutualism, predation, and population attributes etc. Other concepts covered in the chapter are growth rate, birth rate, death rate, age distribution etc.


Chapter 14 : Ecosystem



Ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life. Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. Biotic factors include plants, animals, and other organisms.


Chapter 15 : Biodiversity and Its Conservation



Students get to know different concepts related to biodiversity and its conservation in this chapter. Topics included in the chapter include loss of diversity, biodiversity conservation, red data book, sacred groves, biosphere reserve, wildlife sanctuaries, Ramsar sites etc.


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

  • Ozone layer depletion

  • Deforestation

  • Any one case study as success story addressing environmental issue(s).

Conclusion


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This is awesome explanation!

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Simple way to learn

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Simple way to learn

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