Class 9 Science Chapter 7 NCERT Solutions – Free PDF Download
This chapter has been withdrawn from the CBSE Revised Term-wise Syllabus 2021-22.
NCERT Solutions for Class 9 Science Chapter 7 at INFINITY LEARN is a study aid that includes solutions to questions from the textbook exercise as well as additional practice problems. From the perspective of the test, NCERT Solutions for Class 9 Science Chapter 7- Diversity in Living Organisms is a crucial chapter. The study of Diversity in Living Organisms is required for all of the Plant and Animal Kingdom chapters. As a result, it is advantageous to have a full comprehension of this chapter.
NCERT Solutions assists students in resolving any questions they may have about the topic. The MCQs, lengthy answers, short responses, and tips and techniques aid students in developing a conceptual command of the subject. These solutions can be practiced by students in order to improve their exam scores.
The NCERT Solutions for Class 9 are quite useful in terms of exams. After that, students should go over the solutions.
CHAPTER 7 – DIVERSITY IN LIVING ORGANISMS NCERT SOLUTIONS
1.What are the advantages of classifying organisms? (or) Why do we classify organisms?
A. Advantages of classifying organisms :
i) It makes the study of living organisms easy.
ii) It helps to know the relationships among various groups of organisms.
iii) It provides information about plants and animals, which occur in specific geographical regions.
iv) It helps in scientific research.
v) It helps us to know about evolutionary relationship in different groups of
vi) It helps in understanding the evolution of organisms.
vii) It helps in placement of different organisms in a definite taxonomic group.
2. Give three examples of the range of variations that you see in life forms around you.
A. Examples for the range of variations in life forms around us are:
i) Range of life span – Turtles live for hundreds of years, whereas fruit flies die in few hours.
ii) Range of colours – Life ranges from colourless worms to colourful flowers and birds.
iii) Range of site – Some bacteria are visible only under microscope while blue whales are about 50 meters.
3. How would you choose between two characteristics to be used for developing a hierarchy in classification ?
A. i) For developing a hierarchy of classification, we choose the fundamental characteristics among several other characteristics.
ii) By choosing the basic or fundamental characteristics, we can make broad divisions in living organisms as the next level of characteristics are dependent on these. This goes on to form a hierarchy of characteristics.
iii) For example, plants differ from animals in many ways such as body design, photosynthesis, the absence of locomotion, chloroplasts, cell wall, etc. But, out of these, only locomotion is considered as the basic or fundamental feature that is used to distinguish between plants and animals.
4.Explain the basis for grouping organisms into five kingdoms.
A. Robert .H. Whittaker in 1959 proposed a five kingdom classification.
The basis for grouping organisms into five kingdoms is as follows :
i) On the basis of the presence or absence of membrane-bound organelles, all living organisms are divided into two broad categories eukaryotes and prokaryotes. This division leads to the formation of kingdom Monera, which includes all prokaryotes.
ii) Then, eukaryotes are divided as unicellular and multicellular, on the basis of cellularity. Unicellular eukaryotes form kingdom Protista, and multicellular eukaryotes form kingdom Fungi, Plantae, and Animalia.
iii) Animals are then separated on the basis of the absence of a cell wall.
iv) Since fungi and plants both contain a cell wall, they are separated into different kingdoms on the basis of their modes of nutrition. Fungi have saprophytic mode of nutrition, whereas plants have autotrophic mode of nutrition. This results in the formation of five kingdoms.
5. What are the major divisions in the Plantae? What is the basis for these divisions? Explain briefly.
A. The kingdom Plantae is divided into five main divisions. They are Thallophyta, Bryophyta, Pteridophyta, Gymnosperms, and Angiosperms.
The classification of plants depends on the following criteria :
i) Differentiated or Undifferentiated plant body
ii) Presence / absence of vascular tissues
iii) With / without seeds
iv) Naked seeds / seeds inside fruits
6. How are the criteria for deciding divisions in plants different from the criteria for deciding the subgroups among animals ?
A. The criteria for deciding divisions in plants are :
i) Differentiated / undifferentiated plant body.
ii) Presence / absence of vascular tissue.
iii) Do not produce seeds (pteridophyta) / produce seeds (phanerogams).
iv) Bear naked seeds (Gymnosperms) / Bear seeds inside the fruits (Angiosperms).
v) Have seeds with two cotyledons (dicots) / have seeds with one cotyledon (monocots).
The criteria for deciding subgroups among animals are :
i) Cellular level organisation / Tissue level organisation.
ii) Presence / absence of body cavity and pseudocoelomate.
iii) Presence of body layers (blasticity) (diploblastic and triploblastic)
iv) Symmetry (Asymmetrical, Radial symmetry, Bilateral symmetry etc.)
v) Presence / absence of Notochord and presence of vertebral column.
7. Explain how animals in Vertebrata are classified into further Subgroups.
A. Animals of vertebrates are classified mostly on the basis of their skeletal system, general environmental adaptations, and reproductive system.
Vertebrates are grouped into five classes :
i) PISCES ii) AMPHIBIA iii) REPTILIA
iv) AVES v) MAMMALIA
NCERT Exemplar Solutions for Class 9 Science Chapter 7 are also available.
Class 9 Science Chapter 7 CBSE Notes
Chapter 7: Diversity in Living Organisms NCERT Solutions for Class 9 Science
In the final examinations, there are a total of 20 marks available for questions on this topic, including both long and short questions. There are a number of questions in the NCERT Solutions for Class 9 Science Chapter 7 that can help students prepare for the crucial themes. The most significant subjects are classification and evolution, as well as classification hierarchy. However, one should be well prepared for all of the topics.
Chapter 7 of Science for Class 9 covers the following topics:
3 Questions 7.1 What is the Basis of Classification?
7.2 Evolution and Classification – 2 Questions
7.3 Classification Group Hierarchy – 3 Questions
Plantae – 3 Questions – 7.4
4 Questions – 7.5 Animalia
6. Questions 7.6 Nomenclature – 1
Question Exercise Solutions (Long)
Chapter 7: Diversity in Living Organisms NCERT Solutions for Class 9 Science
The term “diversity of living organisms” refers to the wide range of living things that exist on the planet. H. Whittaker categorized these organisms into five kingdoms, which are as follows:
Monera is a unicellular, prokaryotic organism that can be heterotrophic or autotrophic.
Protista is eukaryotic creatures that are unicellular, autotrophic, or heterotrophic.
Fungi are multicellular eukaryotic organisms that resemble plants and animals. They might be parasitic or saprophytic.
Plantae is multicellular, eukaryotic, autotrophic multicellular eukaryotic autotrophs that are further classed as:
Thallophyta
Bryophyta
Pteridophyte
Gymnosperms
Angiosperms
Animalia is multicellular, eukaryotic heterotrophs that are classed as:
Porifera
Coelenterate
Platyhelminthes
Nematoda
Annelida
Arthropoda
Mollusca
Echinodermata
Chordata
NCERT Class 9 Science Chapter 7 Synopsis:
We can learn more about the diversity of life forms by classifying them.
The following are the key traits used to divide all life into five major kingdoms:
(a) Whether or not they are made up of prokaryotic or eukaryotic cells.
(b) Whether the cells are living independently or as part of multicellular, complex creatures.
(c) Whether or not the cells have a cell wall and manufacture their own nourishment.
All living organisms are classified into five kingdoms based on the preceding criteria: Monera, Protista, Fungi, Plantae, and Animalia.
The evolution of life forms is linked to their classification. Diversity in living organisms in 2019-2020 97
Plantae and Animalia are further subdivided into subcategories based on the complexity of their bodily structures.
Thallophytes, Bryophytes, Pteridophytes, Gymnosperms, and Angiosperms are the five groups of plants.
Porifera, Coelenterata, Platyhelminthes, Nematoda, Annelida, Arthropoda, Mollusca, Echinodermata, Protochordate, and Vertebrata are the 10 classes of animals.
The binomial nomenclature allows us to identify the tremendous diversity of life around us in a consistent manner.
A binomial nomenclature consists of two words: a generic and a specific name.
NCERT Solutions for Class 9 Science Chapter 7- Diversity in Living Organisms: Key Features
- They help you comprehend the concepts better.
- The best available content is offered here, as it was prepared by topic experts.
- Students will benefit from the solutions as they prepare for their exams.
- It answers all of the pupils’ questions about the subject.
NCERT Solutions for Class 9 Science Chapter 7 Frequently Asked Questions
What is the expected number of questions for each topic in NCERT Solutions for Class 9 Science Chapter 7?
The number of questions in NCERT Solutions for Class 9 Science Chapter 7 are as follows:
7.1 What is the Classification Basis? – 3 Concerns
7.2 Evolution and Classification – 2 Questions
7.3 Classification Group Hierarchy – 3 Questions
7.4 Plantae – 3 Questions
7.5 4 Questions – Animalia
7.6 6 Questions Nomenclature – 1 Question Exercise Solutions (Long)
Is it advantageous for students to use the NCERT Solutions for Class 9 Science Chapter 7?
Some of the advantages of using the NCERT Solutions for Class 9 Science Chapter 7 –
- The solutions follow the CBSE syllabus and exam format for the academic year to the letter.
- The importance of all textbook questions that are significant for the tests is increased.
- Well-trained professors create solutions that are of the highest quality and free of errors.
- NCERT Solutions gives a solid foundation of fundamental concepts that will aid students in their career development.
What distinguishes the NCERT Solutions for Class 9 Science Chapter 7 from others?
- Fundamental topics are better understood by students.
- The solutions are meticulously designed by subject matter specialists in accordance with the most recent CBSE rules.
- The solutions serve as a link between the two.
- Students can get answers to their questions as they learn new concepts and gain confidence in the subject.
