CBSE Class 11 Biology NCERT Solutions: Chapter 2, Biological Classifications
Practice is the key to absorb any subject and get high marks in the exams. In order to strengthen the concepts of a subject, you need to solve the problems based on those concepts.
In NCERT books, you will find various questions at the end of each chapter. All these questions are designed on the basis of all conceptual topics involved in the NCERT books. Solving the NCERT questions doesn’t just measure how much you know, it helps reinforce the learning and make it more likely that you can retrieve the same information later. Solving a variety of questions given in the NCERT books can actually be more beneficial for learning than spending the same amount of time in just simply reading the stuff.
In this article we are providing the NCERT Solutions for Class 11 Biology chapter 2, Biological Classifications. All these NCERT solutions are prepared by the subject matter experts and are designed in a way to involve appropriate concepts. Referring these solutions, students will learn to write perfect answers in exams.
Some of the questions and their solutions from NCERT Solutions for Class 11: Biological Classifications, are as follows:
Q. What is the nature of cell-walls in diatoms?
Ans. In case of diatoms, the cell wall forms two thin overlapping shells that fit into each other as the two parts of a soap box. The cell wall is made of silica. Due to the siliceous nature of the cell wall, it is known as diatomaceous earth. This diatomaceous earth is a whitish, soft, chemically inert, highly absorbant and fire proof substance. It is used in filtration of oils, sugars, and for other industrial purposes.
Q. Find out what do the terms ‘algal bloom’ and ‘red-tides’ signify.
Ans. Algal bloom: A rapid increase in the population of green algae in a water body, imparting a green colour to the water body, is termed as algal bloom. This causes an increase in the biological oxygen demand (BOD), resulting in the death of fishes and other aquatic animals.
Red-tides: Red tides are caused by the red dinoflagellates (Gonyaulax) that multiply rapidly in sea and impart it a red colour. They release large amounts of toxins in water that can cause death of a large number of aquatic animals.
Q. How are viroids different from viruses?
Ans. Viroids are different from viruses as:
- Viroids are smaller in size than viruses.
- In viruses, protein coat is present and they contain both RNA as well as DNA whereas the viroids lack the protein coat and contain only free RNA.
- Virus causes diseases like mumps and aids. On the other hand, viroid causes plant diseases like potao-spindle tuber disease.
Q. What do the terms phycobiont and mycobiont signify?
Ans. The algal component of the lichens which is capable of carrying out the process of photosynthesis and hence produces food, is known as phycobion , whereas the fungal component which provides shelter to algae and absorbs water and nutrients from the soil is called mycobiont.
Get the complete the NCERT solutions for Class 11: Biological Classifications, from the following link:
Students may download the NCERT solutions for Class 11 Biology chapter- Biological Classifications, in the form of PDF.
Class 11 Biology NCERT Chapter: Biological Classifications
When you sit for solving the NCERT questions given in a particular chapter, you must have the concepts and fundamentals explained in that chapter in your mind. Only then you will be able to understand the problem in an efficient way. NCERT books are best known to explain the concepts in a much easier and simpler way than any other books. So, before solving the questions given in the Class 11 Biology NCERT chapter- Biological Classifications, students should thoroughly read this chapter to grasp all the concepts explained in it. This will help you understand the problem discussed in a question and then come with an appropriate answer.
Main topics discussed in Class 11 Biology chapter: Biological Classifications are:
- Kingdom Monera
- Kingdom Protista
- Kingdom Fungi
- Kingdom Plantae
- Kingdom Animalia
- Viruses, Viroids and Lichens.
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