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CBSE Quick Revision Notes Class 11 Biology Chapter 2: The biological classification in Chapter 2 is a very important biology lesson in the NCERT textbook from the CBSE exam point of view. The NCERT Class 11 Biology Chapter 2 notes give you a basic idea about the biological classification and diversity of living beings and the animal world. The important topics covered in the NCERT Class 11 Biology notes are the characteristics of the Five Kingdoms, examples, definitions, Kingdom Monera, Kingdom Protista, Kingdom Fungi, Kingdom Plantae, Kingdom Animalia, Viruses, Viroids and Lichens. Plantae include algae, bryophytes, pteridophytes, gymnosperms, and angiosperms. Download the CBSE Notes for Class 11 Biology, Chapter 2, PDF to use it offline anywhere. Students must go through each topic in the biological classification of Class 11 biology in the easiest and most effective way possible with the help of NCERT Notes for Class 11.
Class 11 biology chapter 2 notes also cover all the important concepts related to the characteristics of the five kingdoms given in this chapter, which are useful in various competitive exams. The biological classification NCERT Notes for Class 11 Biology help you revise crucial concepts given in the NCERT Book in no time during the CBSE Board exam preparation. CBSE Class 11 Biology Chapter 2 notes will help you with quick revision of the classification. The Biological Classification chapter covers all headings of NCERT. CBSE Class 11 Biology Chapter 2 notes also contain important examples that have been frequently asked in the various exams. NCERT Solutions and having revision notes for Class 11 Biology Chapter 2 handy are beneficial to save you time. The NCERT Class 11 notes PDF can be downloaded through the link given below.
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The table compares and contrasts the five kingdoms' various qualities.
Characters | Kingdoms | ||||
Monera | Protista | Fungi | Plantae | Animalia | |
Cell type | Prokaryotic | Eukaryotic | Eukaryotic | Eukaryotic | Eukaryotic |
Cell Wall and its component | Present, Peptidoglycan | Absent | Present, chitin | Present, cellulose | Absent |
Nuclear membrane | Absent | Present | Present | Present | Present |
Level of Organisation of the body | Unicellular | Unicellular | multicellular / loose tissue | Multicellular body differentiated into tissue / organ | Multicellular body is differentiated into a tissue / organ / organ system. |
Mode of nutrition | Autotrophic and heterotrophic | Autotrophic and heterotrophic | Heterotro-phic (Saprophy-tic or Parasitic) | Autotrophic (Exception: Cascuta shows parasitic nutrition) | Heterotro-phic |
Different shapes of bacteria
Dinoflagellates
Euglenoid
Slime Mould
Protozoans are all heterotrophic, meaning they exist as predators or parasites. Animal relatives are thought to be their ancestors. Protozoans are divided into four categories.
Amoeboid protozoans: Freshwater, seawater, and moist soil are all suitable habitats for these organisms. They move and capture their prey in the same way that Amoeba does. The surface of marine animals is covered with silica shells. Entamoeba, for example, is a parasitic worm.
Flagellated protozoans: This group's members are either free-living or parasitic. They have flagella on their bodies. Trypanosoma is a good example.
Ciliated Protozoans: Due to the presence of thousands of cilia, these organisms are aquatic and actively moving. On the cell surface, they feature a cavity (gullet) that opens to the outside. Paramoecium is a good example shown in the figure below.
Sporozoans: This comprises a wide range of species with a spore-like stage in their life cycle. Plasmodium (malarial parasite), which causes malaria, is the most well-known.
Paramoecium
On the basis of the mycelium mode of spore generation and fruiting bodies, fungi are categorized into distinct classes.
Note: You will study about kingdom plantae in detail in next chapters.
Note: You will study kingdom Animalia in detail in chapter 4.
Different shapes and sizes of viruses
The chapter-wise Notes for class 11 biology are given below:
NCERT Class 11 Biology Chapter 2 Notes |
Significance of NCERT Class 11 Biology Chapter 2 Notes:
These CBSE notes for Class 11 Biology Chapter 2 Biological classification are very helpful for your CBSE Board Exam preparation. Biological Classification Class 11 notes will be useful for revising the chapter and getting a sense of the main topics covered in the chapter. These Notes for Class 11 Biology, chapter 2 are also useful for covering the main topics of the CBSE Biology Syllabus for Class 11, 2024, as well as for competitive exams such as AIPMT, AIIMS, NEET, and so on. These Class 11 Biology chapter 2 notes pdf download can be used to prepare in offline mode.
Following are the related links to the class 11 notes PDF download:
NCERT Notes for Class 11 Biology | |
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The main topics which are very important and are covered in Class 11 Biological classification notes are as follows
Kingdom Monera
Kingdom Protista
Kingdom Plantae
Kingdom Animalia
Viruses, Viroids, Prions and Lichens
Subject experts have created Class 11 Biology chapter 2 notes that will give you further information on the subject. You can reinforce your foundation with these Class 11 chapter 2 notes. The segment delves into every aspect of biological classification.
According to Biological classification Class 11 notes, the majority of Euglenoids are freshwater creatures that live in stagnant water. They contain a protein-rich layer called a pellicle instead of a cell wall, which allows them to bend their bodies.
They have two flagella, one that is short and the other that is long. When they are exposed to sunlight, they are photosynthetic, but when they are not, they behave like heterotrophs, predating on other smaller species. Euglenoids have pigments that are nearly identical to those found in higher plants
Protozoans are all heterotrophic, meaning they exist as predators or parasites. Animal relatives are thought to be their ancestors.
Protozoans are divided into four categories.
Amoeboid protozoans: Freshwater, seawater, and moist soil are all suitable habitats for these organisms. As in Amoeba, they move and seize their prey by putting out pseudopodia (false feet).
Flagellated protozoans: This group's members are either free-living or parasitic. They have flagella on their bodies. Trypanosoma is a good example.
Ciliated Protozoans: Due to the presence of thousands of cilia, these organisms are aquatic and actively moving. On the cell surface, they feature a cavity (gullet) that opens to the outside.
Sporozoans: This comprises a wide range of species with a spore-like stage in their life cycle. The most well-known is Plasmodium (malarial parasite), which causes malaria. Malaria is a disease that has a severe effect on people's lives.
In accordance with Biological classification Class 11 notes, Two Kingdom Classification did not fit a large number of organisms. As a result, the two-kingdom classification, which had been in use for a long time, was found to be inadequate. Cell structure, body structure (unicellular or multicellular), nutrition, and lifestyle are used to classify the five kingdoms. As a result, it is more useful than the two-kingdom classification system.
Biological classification is one of the most important topics in NEET EXAM. You will face many questions related to biological classification. NCERT Biology chapter 2 for Class 11 notes are very important in Biology and in order to get good results in exams, you must have proper and in-depth knowledge and understanding of the concept.
Viruses are non-cellular organisms with an inert crystalline structure that exists outside of the living cell. Outside the living cell, they form a thin loose covering, but they can multiply inside the host cell. They replicate themselves by taking over the host's body.
T.O. Diener discovered a new infectious agent that caused potato spindle tuber disease in 1971. It was smaller than viruses. It was discovered to be a free RNA that lacked the protein coat that viruses have, thus the name viroid. The viroid's RNA had a low molecular weight
A virus has DNA or RNA as its genetic material and a protein coat, whereas viroids have RNA as its genetic material but no protein coat.
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