CBSE Class 11 Biology Notes Chapter 2: On this page, we have made the CBSE Class 11 Biology Notes Chapter 2 available in PDF format. All of the unit's key points are contained in the PDF. Before tests, students can review the information here quickly in addition to the textbook. Students can be sure that our CBSE Class 11 Biology Notes Chapter 2 will allow them to review it at any time, or any place. The rationale is that the link provided below allows you to download this PDF.
Class 11 biological classification is the process of dividing up organisms according to their characteristics. This chapter requires understanding and memorization skills because it requires you to retain several crucial phrases and details. To find out about all the significant subjects discussed in the chapters, read the article below.CBSE Class 11 Biology Notes Chapter 2 PDF
Chemosynthetic Autotrophs
Certain inorganic compounds, such as nitrites and nitrates, can be oxidised by these bacteria. ATP is created using the energy that is liberated during the oxidation process. Asexual reproduction in bacteria is possible through a mechanism known as binary fission. If conditions are unfavourable, they can also proliferate through spores. Mycoplasma is included in the Monera category as well. Since they lack a cell wall, they can thrive in anaerobic environments. The smallest known living organism is Mycoplasmas.CBSE Class 12th Toppers List 2024
Chrysophytes
It is made up of golden algae and diatoms. Both freshwater and saltwater are home to them. Most of them are photosynthetic. Their unbreakable cell wall is a result of the silica present in it, which also contributes to the development of diatomaceous earth. They are the primary oceanic producers. Most of them are flagellates with a single cell. They resemble amoeboids.Dinoflagellates
These organisms are marine and carry out photosynthesis. They may have a variety of colours, such as blue, red, brown, or yellow. The presence of various coloured pigments within the dinoflagellate cells is what gives the illusion of colour. Cellulose makes up the cell wall. They have two flagella; one is positioned transversely, and the other longitudinally. Among the instances are Noctiluca scintillans and Gonyaulax catenella.Euglenoids
Freshwater organisms known as euglenoids are found in stagnant water. A layer known as a pellicle, which is rich in proteins, surrounds these organisms. They can function as both autotrophic and heterotrophic organisms, such as Euglena, and have one long and one short flagellum. Chloroplasts are present in the majority of euglenoids so they can produce their sustenance. The paramylon (carbohydrate) food stores are present in euglenoids.Slime moulds
They are saprophytic by nature, and in the right circumstances, they can produce plasmodiums, which are aggregation. They have real cell walls, are quite resistant to harsh environments, and under poor circumstances, develop fruiting bodies with spores.Protozoan like Protists
It is known that they are heterotrophs. They can exist as parasites and predators. Four categories of protozoa exist: Freshwater, moist soil, and saltwater are home to amoeboid protozoa, which have pseudopodia that allow them to consume food particles like those found in amoeba. Flagellate protozoa can be classified as either parasitic or free-living. Numerous parasitic illnesses are caused by this group of organisms. Trypanosoma, for instance, is the cause of sleeping sickness. Thousands of cilia are present in ciliated protozoa. They can travel forward or backwards thanks to the cilia's movement. It also facilitates the intake of external food. Consider Paramecium.