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NCERT Solutions for Class 11 Biology Chapter 1 The Living World

NCERT Solutions for Class 11 Biology Chapter 1 The Living World

Edited By Irshad Anwar | Updated on Sep 04, 2023 07:05 PM IST

Biology Class 11 Chapter 1 | The Living World NCERT Solutions PDF

NCERT Solutions for Class 11 Biology Chapter 1 - The Living World here: Students can find detailed answers to all the Exercise Questions in the NCERT Class 11 Textbook Biology by consulting NCERT Solutions for Class 11 Biology. The most recent CBSE Syllabus revision is in line with it. A careful plan, supported by thorough and in-depth concept learning, is your best bet for acing the board exams. This is why students can rely on NCERT Solutions for Class 11 (PCMB).

How wonderful is The Living World Class 11 chapter of NCERT Solutions for Class 11 Biology. The wide range of living types is amazing. Solutions for NCERT Class 11 Biology Chapter 1 - The Living World contain amazing explanations of all the questions that are based on the diversity of living organisms. In this Class 11th Biology Chapter 1, you will learn that early man could easily perceive the difference between inanimate matter and living organisms. A common feature of all such forms of inanimate and animate objects was the sense of awe or fear that they evoked. Such facts will be studied in Biology Class 11 Chapter 1, and you can easily find NCERT Class 11 Biology Chapter 1 Exercise solutions. If you need an answer from any other chapter of any other class (from NCERT), then go through NCERT Solutions, there you will get all the answers easily.

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After going through Biology Class 11 Chapter 1 thoroughly, you must be able to answer these questions, which are given below:

NCERT Solutions For Class 11 Biology Chapter 1 - The Living World (Solved Exercise)

The Class 11 Biology Chapter 1 Question Answers are explained in detail for better understanding.

Q1. Why are living organisms classified?

Answer:

Living organisms are classified because of the following reasons

1. Due to a large variety of life forms on earth, it becomes difficult to study each of the species, thus scientists classify these species into larger groups, wherein by studying a group, we can deduce the characteristics of all the species. Hence living organisms are classified for the ease of studying them.

2. Classifying organisms into groups and sub-groups may also aid in establishing evolutionary relationships between them.

Q2. Why are the classification systems changing every now and then?

Answer:

Earth is a home for numerous species of plants, animals and microbes. The exact count of these life forms is still unknown. Scientists have discovered many species present on Earth. These have been properly named and classified as per the existing classification systems. However, there are still so many species to be discovered. Whenever new species are discovered the classification systems are modified according to the requirements. Therefore, the classification systems are always dynamic and they keep on changing as per the needs.

Q3. What different criteria would you choose to classify people that you meet often?

Answer:

The people that we often meet can be classified on the basis of their sex or gender, the age group in which they fall, profession, education, hobbies etc.

Q4. What do we learn from identification of individuals and populations?

Answer:

The identification of individuals based on their characteristics helps us to know how an individual differs from the other members of the population and in what points it is similar to the population. It also helps us deduce relationships between individuals of different population. Such relationships help in classifying organisms in their right groups. Learning the characteristics of populations aid in the study of that population as well as how it can be related to the other populations. Through this practice, e can establish evolutionary relationships between different populations.

The Living World Class 11 Questions and Answers

Q5. Given below is the scientific name of Mango. Identify the correctly written name.

  • Mangifera Indica
  • Mangifera indica

Answer:

The correct scientific name of mango is Mangifera indica. As per the binomial system of nomenclature, the first name in a scientific name is the genus name while the second name is specific. The scientific name is always written in italics. The first letter of the genus name is written in capitals while that of the specific name is written in small letters.

Q6. Define a taxon. Give some examples of taxa at different hierarchical levels.

Answer:

Taxon refers to a particular level of hierarchy in the classification of living beings. The examples of taxa at different hierarchical levels are species, genus, order, family, phylum and kingdom.

Q7. Can you identify the correct sequence of taxonomical categories:

(A) Species \rightarrow Order \rightarrow Phylum \rightarrow Kingdom

(B) Genus \rightarrow Species \rightarrow Order \rightarrow Kingdom

(C) Species \rightarrow Genus \rightarrow Order \rightarrow Phylum

Answer:

The correct sequence of taxonomic categories from lowest to highest is species, genus, family, order, class, phylum, kingdom. Thus, A and C represents the correct sequence of taxonomic categories with some categories missing in between while B is incorrect as the genus is given before species.

Q8. Try to collect all the currently accepted meanings for the word ‘species’. Discuss with your teacher the meaning of species in case of higher plants and animals on one hand, and bacteria on the other hand.

Answer:

Species can be defined in various ways such as

1. Species refers to a group of individuals similar in their fundamental characteristics and can interbreed among themselves.

2. Species is the basic unit of classification which assembles individuals which share common genetic set-up.

3. Species refers to a natural group of individuals similar in morphology, physiology, anatomy, cytology etc.

Since, higher plants and animals show sexual reproduction extensively, in their case first definition of species is applicable i.e. species refers to a group of individuals similar in their fundamental characteristics and can interbreed among themselves. On the other hand, in case of bacteria, the second and third definitions are applicable.

Class 11 Biology Chapter 1 Exercise Solutions

Q9. Define and understand the following terms:

(i) Phylum

Answer:

Phylum- A phylum is a large group of animals. which is formed of one or more classes. The term phylum is replaced by division in case of plants. For example, the phylum chordate of animals contains mammals, aves, reptiles, amphibians, etc.

Q9. Define and understand the following terms:

(ii) Class

Answer:

Class- It is a taxonomic group higher than order and lower to phylum. A class is made of one or more related orders. For example, the class dicotyledoneae of flowering plants contain all dicots which are grouped into several orders like Rosales, Polemoniales etc.

Q9. Define and understand the following terms:

(iii) Family

Answer:

Family refers to that taxonomic category which contains one or more related genera. For example, family Solanaceae contains a number of genera like Solanum, Withania, Datura etc. All genera of a family related through some common features or correlated characters.

Q9. Define and understand the following terms:

(iv) Order

Answer:

Order is the taxonomic category higher to family and lower to class. An order consists of one or more groups of families which share certain common characteristics. For example, families felidae and canidae are included in same order carnivore.

Q9. Define and understand the following terms:

(v) Genus

Answer:

Genus- A genus is a group of related species which resemble one another in certain correlated characters. All species of genus presumed to have evolved from a common ancestor. Lion, Tiger, Leopard are closely related species and placed in same genus Panther.

Q10. How is a key helpful in the identification and classification of an organism?

Answer:

A taxonomic key refers to an artificial analytical device used for identifying organisms. Usually, in a key, two contrasting characters are used. The one present in the organism is chosen while other is rejected. Each statement of a key is called a lead. Separate taxonomic keys are used for each taxonomic category like species, genus, family, etc. Keys are generally analytical in nature.

Q11. Illustrate the taxonomical hierarchy with suitable examples of a plant and an animal.

Answer:

Taxonomical hierarchy refers to the classification of organisms into a definite sequence of taxonomic categories starting from the kingdom and going up to species. The illustration of the taxonomic hierarchy is given below.

Taxonomic categories Animals- human Plant- rose
Kingdom Animalia Plantae
Phylum/Division Chordata Angiospermae
Class Mammalia Dicotyledonae
Order Primata Rosales
Family Hominidae Rosaceae
Genus Homo Rosa
Species sapiens indica

Important Topics Of NCERT Solutions For Class 11 Biology Chapter 1 - The Living World

Topics and Subtopics in NCERT Solutions for Class 11 Biology Chapter 1 The Living World:

1.1 What is ‘Living’?

1.2 Diversity in the Living World

1.3 Taxonomic Categories

1.3.1 Species

1.3.2 Genus

1.3.3 Family

1.3.4 Order

1.3.5 Class

1.3.6 Phylum

1.3.7 Kingdom

1.4 Taxonomical Aids

1.4.1 Herbarium

1.4.2 Botanical Gardens

1.4.3 Museum

1.4.4 Zoological Parks

1.4.5 Key

Highlights of NCERT Solutions Class 11 Biology Chapter 1 - The Living World

Class 11 Biology Chapter 1 NCERT Solutions highlights are given below:

  • The solution given for Biology Class 11 Chapter 1 is written in the best possible way using simple language that makes solutions easier to read and understand
  • In the Class 11 Biology Chapter 1 Exercise Solutions, points are used to frame answers to help readers understand them quickly.
  • Class 11 Biology Chapter 1 NCERT Solutions are derived from the textbook by the subject expert.
  • Biology Class 11 Chapter 1 Question Answers are as per the latest CBSE Syllabus and guidelines.
  • The Living World Class 11 PDF links are readily available and easily accessible for free.
  • Important topics are listed in the NCERT Solutions: Living World Class 11 NCERT PDF.
  • Class 11 Biology Chapter 1 Question Answer is a great resource for information.
  • Class 11 biology chapter 1 exercise solution will also help you prepare for your competitive exams like NEET.
  • Class 11 Chapter 1 Biology, will also boost your knowledge and interest in biology.
  • NCERT is the base of your learning, and here it's easy to access.
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NCERT Solutions for Class 11 Biology: Chapter-wise

NCERT Solutions for Class 11: Subject-wise

Also check the NCERT Books and NCERT Syllabus here :

Related Study Material

In preparation for exams like the JEE Main and NEET, consider the following related studies.

Class 11 Biology Chapter 1 – The Living World

Class 11th Biology Chapter 1: In, biology class 11 chapter 1, you will study taxonomy which is the branch of knowledge dealing with various species of plants and animals that are useful in agriculture, forestry, industry and in general for knowing our bio-resources and their diversity. These taxonomic studies related questions are mentioned at the end of this chapter the living world class 11 and to get class 11 biology NCERT solutions for this chapter, check NCERT solutions for living world class 11. The Living World Class 11 Questions and Answers are prepared by the experienced subject experts.

Try to attempt all the questions given in the biology class 11 chapter 1. Because of this you will make your base stronger, as Class 11 Biology NCERT Solutions will not only help you in the preparations of the 12th board exam as well as also for other entrance exams like NEET.

Frequently Asked Questions (FAQs)

1. What are the benefits of NCERT solutions for biology class 11 chapter 1?
  • NCERT is the base of your learning.   
  • You will get all the answers to biology class 11 chapter 1  and the living world class 11 solution will help you to score good marks in the exam.   
  • NCERT solutions for biology class 11  will also help you with competitive exams like NEET.   
  • NCERT solutions for class 11 biology chapter 1 the living world will also help you to boost your marks in the 12th board exam.   
  • Class 11 biology ncert solutions will also boost your knowledge.  
  • To score well in the examination, follow the NCERT syllabus and solve the exercise given in the NCERT Book. To practice more problems, students must refer to NCERT Exemplar.
2. What is taxonomic key given in biology class 11?

A taxonomic key refers to an artificial analytical device used for identifying organisms. Usually, in a key, two contrasting characters are used. The one present in the organism is chosen while other is rejected. Each statement of a key is called a lead. Separate taxonomic keys are used for each taxonomic category like species, genus, family.

3. What are the important topics of biology class 11 chapter 1?

The important topics of biology class 11 chapter 1 are: 

  • Diversity in the Living World
  • Species   
  • Genus   
  • Family   
  • Order   
  • Class   
  • Phylum   
  • Kingdom   
  • Taxonomical Aids   
4. What are the benefits of referring to the NCERT Solutions for Class 11 Biology Chapter 1?

In order to answer textbook questions correctly, students should consult the NCERT Solutions for Class 11 Biology Chapter 1. The interactive way in which the solutions are created by the experts allows students to better understand the key ideas. Students will be able to analyze the kinds of questions that would be asked in Class 11 exams through regular practice. The answers assist students in finishing the CBSE syllabus on time and concentrating on revision a few months before the board exam.

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A block of mass 0.50 kg is moving with a speed of 2.00 ms-1 on a smooth surface. It strikes another mass of 1.00 kg and then they move together as a single body. The energy loss during the collision is

Option 1)

0.34\; J

Option 2)

0.16\; J

Option 3)

1.00\; J

Option 4)

0.67\; J

A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1 m 1000 times.  Assume that the potential energy lost each time he lowers the mass is dissipated.  How much fat will he use up considering the work done only when the weight is lifted up ?  Fat supplies 3.8×107 J of energy per kg which is converted to mechanical energy with a 20% efficiency rate.  Take g = 9.8 ms−2 :

Option 1)

2.45×10−3 kg

Option 2)

 6.45×10−3 kg

Option 3)

 9.89×10−3 kg

Option 4)

12.89×10−3 kg

 

An athlete in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can be estimated to be in the range

Option 1)

2,000 \; J - 5,000\; J

Option 2)

200 \, \, J - 500 \, \, J

Option 3)

2\times 10^{5}J-3\times 10^{5}J

Option 4)

20,000 \, \, J - 50,000 \, \, J

A particle is projected at 600   to the horizontal with a kinetic energy K. The kinetic energy at the highest point

Option 1)

K/2\,

Option 2)

\; K\;

Option 3)

zero\;

Option 4)

K/4

In the reaction,

2Al_{(s)}+6HCL_{(aq)}\rightarrow 2Al^{3+}\, _{(aq)}+6Cl^{-}\, _{(aq)}+3H_{2(g)}

Option 1)

11.2\, L\, H_{2(g)}  at STP  is produced for every mole HCL_{(aq)}  consumed

Option 2)

6L\, HCl_{(aq)}  is consumed for ever 3L\, H_{2(g)}      produced

Option 3)

33.6 L\, H_{2(g)} is produced regardless of temperature and pressure for every mole Al that reacts

Option 4)

67.2\, L\, H_{2(g)} at STP is produced for every mole Al that reacts .

How many moles of magnesium phosphate, Mg_{3}(PO_{4})_{2} will contain 0.25 mole of oxygen atoms?

Option 1)

0.02

Option 2)

3.125 × 10-2

Option 3)

1.25 × 10-2

Option 4)

2.5 × 10-2

If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will

Option 1)

decrease twice

Option 2)

increase two fold

Option 3)

remain unchanged

Option 4)

be a function of the molecular mass of the substance.

With increase of temperature, which of these changes?

Option 1)

Molality

Option 2)

Weight fraction of solute

Option 3)

Fraction of solute present in water

Option 4)

Mole fraction.

Number of atoms in 558.5 gram Fe (at. wt.of Fe = 55.85 g mol-1) is

Option 1)

twice that in 60 g carbon

Option 2)

6.023 × 1022

Option 3)

half that in 8 g He

Option 4)

558.5 × 6.023 × 1023

A pulley of radius 2 m is rotated about its axis by a force F = (20t - 5t2) newton (where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is 10 kg m2 , the number of rotations made by the pulley before its direction of motion if reversed, is

Option 1)

less than 3

Option 2)

more than 3 but less than 6

Option 3)

more than 6 but less than 9

Option 4)

more than 9

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