Biology, in general, can seem very easy. Many times student can be stuck up to many critical concepts. To resolve this issue Physics Wallah has come up with NCERT solutions for class 12 biology for students. The complete set of NCERT Solutions offered is as per NCERT guidelines only. Since class 12th is already an advance stage of biology. The NCERT solutions for class 12 biology prepared by the team is to ensure every student score maximum marks.
These solutions are as per the latest NCERT guidelines only. The complete line up of NCERT solutions for class 12 biology ensure students easy understanding of the topic. This solution in overall expand student’s logical thinking horizon.
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Preparing for class 12 biology and NEET entrance exam need NCERT as a mandatory book. The key benefit for NCERT solutions class 12 biology and NCERT text book for class 12 biology are.
Academic team of Physics Wallah prepared all required resource which is required for class 12 Biology which includes detail chapter wise theory for class 12 Biology, Notes on class 12 botany, objective questions for class 12 Biology, chapter wise online test for class 12 Biology, formula for class 12 Biology.
One must read the NCERT textbook for class 12 Biology and can use as a reference for ncert solution for class 12 Biology. For entrance exam like JEE & NEET Physics Wallah consist of all useful material start from previous year papers, sample papers, important formula for Biology,revision notes for class 12 Biology
Chapter - Evolution
The basic similarities in chemical and structural organization of all organisms as stated above, exclude the “Spontaneous Generation” and “Special Creation” theories from the list of acceptable explanations for diversity of “Life” upon earth. Moreover, these similarities imply origin of all diverse forms of organisms from a common ancestor.
Like the concepts of “Cosmic” and “Chemical” evolutions, therefore, the concept of “Organic Evolution” is now universally accepted as an explanation for the origin of all diverse forms of “life” from the first primordial organisms that arinert matter’ upon primitive ‘earth.
Let us consider, for a while, the order and grading we can witness amongst the existing varieties of organisms themselves. We know that animals and plants are organisms of two very distinct categories, yet the distinction between these at the primitive, unicellular level of organization is so little that a common “kingdom Protista” has been proposed to include all unicellular animals and plants together.
Similarly, we know that such diverse forms as houseflies, ants, mosquitoes, louse, bedbugs, grasshoppers, butterflies, etc., are all included into a common group “The Insecta”. Likewise, the fishes, frogs, lizards, birds and mammals form a common group, “The Vertebrata” in spite of their pronounced diversity.. All this order and grading proves a gradual “Organic Evolution” of diverse varieties of organisms from common ancestors at different levels.
Chapter - Ecosystem
Term ecosystem was first of all given by A.G. Tansley (1935), he defined it as, “system arising out of interactions between living and non-living components of environment”. (Eco-environment + System – interacting interdependent complex). In any ecosystem, communities or living organisms interact with their physical environment in such a way that there is a well defined flow of energy forming clear trophic (food) levels and material cycles within this system.
Chapter - Biodiversity and Conservation
Biodiversity or biological diversity is the diversity of life. It is defined as variation of life at all levels of biological organisation - within a species, among species and comparative diversity among ecosystems. Ecologists define biodiversity as the “totality of genes, species, and ecosystems of a region”.
It is mainly of 4 types –
The overall biodiversity of the Earth.Biodiversity not only applies species, but also to their immediate environment i.e. biotope (an area that is uniform in environmental conditions and in its distribution of animal and plant life) and their larger ecoregion (an area constituting a natural ecological community with characteristic flora, fauna, and environmental conditions and bounded by natural rather than artificial borders).
An ecozone or biogeographic realm is the largest scale biogeographic division of the earth’s surface based on the historic and evolutionary distribution patterns of plants and animals. Ecozones represent large areas of the earth’s surface where plants and animals developed in relative isolation over long periods of time, and are separated from one another by geologic features, such as oceans, broad deserts, or high mountain ranges, that formed barriers to plant and animal migration.
Chapter - Environmental Issues
Any undesirable change of the physical, chemical or biological characteristics in the atmosphere, lithosphere and hydrosphere which is harmful to man directly or indirectly through his animals, plants, industrial units or raw material is called pollution.
Kinds of Pollution
Chapter - Organisms and Populations
It is a grouping of different but interacting populations of different species which live harmoniously in a given locality e.g. pond community, lawn community, forest community. Each such community may further be split into animal community, plant community and microbe community.
Q1. How NCERT textbook help me to score good marks in CBSE board class 12 Biology?
Ans. CBSE board recommended and prescribe book for class 12 Biology is NCERT textbook. The NCERT textbook is prepared as per the latest syllabus of CBSE and perfect textbook for all aspirants who are preparing for the CBSE class 12 board exam. To score good marks in the CBSE class 12 Biology NCERT textbook is mandatory and one must complete this textbook thoroughly.
Scoring good marks in class 12 Biology need the right strategy which starts with proper planning to complete the syllabus before two months of the final exam date. In last two-month complete revision will help you to score good marks in class 12 Biology.
Q2. How to use NCERT solutions for class 12 Biology effectively?
Ans. NCERT solutions for class 12 Biology prepared by an academic team of Physics Wallah with this vision that it must be used for reference purposes only. Never copy NCERT solutions for class 12 Biology. The best way to use these solutions is to read the chapter carefully and try to solve all questions by yourself if you face any problem to find out the answer to a particular question refer to the textbook. Still unable to get the answer now you can use NCERT solutions for class 12 Biology.
Q3. Should we need to solve additional MCQ based questions apart from NCERT exercise?
Ans. Yes, the best part of MCQ is it helps you to find the mistake and helps to build conceptual clarity in all parts of chapters. NCERT textbook for class 12 Biology consists of enough questions for your CBSE board still if you are preparing for NEET or any other competitive entrance exam then you need to solve few additional MCQ based questions form available reference books.
Q4. What are the important chapters of class 12 biology?
Ans. Class 12 Biology consists of two parts one is zoology and the second is botany. Both parts are equally important for the CBSE board exam. One must read and make notes of all chapters and few topics are a bit more important such as Reproduction, Genetics, Human welfare, Biotechnology, and Ecology.
Q5. Are NCERT class 12 Biology textbook is enough for CBSE board and entrance exam?
Ans. Yes class 12 NCERT textbook is more than sufficient for CBSE board as well as for competitive entrance exam. While reading the textbook make sure you are preparing the notes of the chapter and add all-important points and diagrams on your notes. Do solve previous year CBSE questions paper uploaded by Physics Wallah at the previous year section.