SEBA Class 9 Science Chapter 7 : Diversity in Living Organisms | Assam Eduverse
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SEBA Class 9 Science Chapter 7 Diversity in Living Organisms solutions are prepared by Assam Eduverse strictly according to the latest SEBA / ASSEB syllabus 2026–27. These SEBA Class 9 Science Chapter 7 Diversity in Living Organisms solutions are created specifically for students searching for SEBA Class 9 Science Chapter 7 Diversity in Living Organisms solutions that are accurate, updated, and exam-oriented. This page provides complete SEBA Class 9 Science Chapter 7 Diversity in Living Organisms solutions, making it a reliable and trusted source for SEBA Class 9 Science Chapter 7 Diversity in Living Organisms solutions based entirely on the official SEBA Class 9 Science textbook.
The SEBA Class 9 Science Chapter 7 Diversity in Living Organisms solutions explain every concept included in SEBA Class 9 Science Chapter 7 Diversity in Living Organisms solutions, such as diversity in living organisms, basis of classification, hierarchy of classification, and five-kingdom classification. These SEBA Class 9 Science Chapter 7 Diversity in Living Organisms solutions also cover characteristics of Monera, Protista, Fungi, Plantae, and Animalia. All SEBA Class 9 Science Chapter 7 Diversity in Living Organisms solutions help students understand theory, definitions, diagrams, and reasoning questions using SEBA Class 9 Science Chapter 7 Diversity in Living Organisms solutions written in simple and exam-friendly language, following the ASSEB Class 9 Science Chapter 7 solutions format.
With the complete SEBA Class 9 Science Chapter 7 Diversity in Living Organisms solutions (2026–27), students can confidently prepare SEBA Class 9 Science Chapter 7 Diversity in Living Organisms solutions for intext questions and SEBA Class 9 Science Chapter 7 Diversity in Living Organisms solutions for chapter-end textbook exercise questions. These SEBA Class 9 Science Chapter 7 Diversity in Living Organisms solutions include important Diversity in Living Organisms question answers, classification charts, and exam-focused explanations. Assam Eduverse ensures every SEBA Class 9 Science Chapter 7 Diversity in Living Organisms solution is syllabus-based, conceptually accurate, and fully exam-focused for SEBA and ASSEB examinations.
SEBA / ASSEB Class 9 Science Chapter 7 – Diversity in Living Organisms Intext Questions & Answers (Latest Syllabus 2026–27)
📝Page 80
Q1. Why do we classify organisms?
Answer:
Classifying organisms is necessary to make the study of the enormous variety of life forms easier and systematic. Classification helps to group similar organisms together, understand their relationships, and study the diversity in an organized way.
Q2. Give three examples of the range of variations that you see in life-forms around you.
Answer:
- Size variation: From microscopic bacteria (few micrometres) to blue whales (about 30 metres).
- Lifespan variation: Pine trees may live for thousands of years, mosquitoes survive only a few days.
- Colour and form: Life ranges from colourless worms to brightly coloured birds and flowers.
📝Page 82
Q1. Which do you think is a more basic characteristic for classifying organisms?
(a) the place where they live.
(b) the kind of cells they are made of. Why?
Answer:
(b)The kind of cells organisms are made of is a more basic characteristic because cell structure determines fundamental body design and functions, unlike the place where they live, which may have only superficial similarities.
Q2. What is the primary characteristic on which the broad division of organisms is made?
Answer:
The presence or absence of a cell nucleus (eukaryotic or prokaryotic cell) is the primary characteristic for broad division among organisms.
Q3. On what bases are plants and animals put into different categories?
Answer:
Plants and animals are categorized based on their mode of nutrition (autotrophic or heterotrophic), cell wall presence, and differences in body design and organization.
📝Page 83
Q1. Which organisms are called primitive and how are they different from the so-called advanced organisms?
Answer:
Primitive organisms are those with simple and ancient body designs that have not changed much over evolutionary time. Advanced organisms have more complex and specialized body structures developed later in evolution.
Q2. Will advanced organisms be the same as complex organisms? Why?
Answer:
Yes, advanced organisms are generally the same as complex organisms because evolutionary advancement usually results in increased complexity in body structure and functions.
📝Page 85
Q1. What is the criterion for classification of organisms as belonging to kingdom Monera or Protista?
Answer:
Organisms in kingdom Monera are prokaryotic (do not have a defined nucleus or organelles) and unicellular. Protista includes unicellular eukaryotes which have a defined nucleus and organelles.
Q2. In which kingdom will you place an organism which is single-celled, eukaryotic and photosynthetic?
Answer:
Such an organism is placed in the Protista kingdom.
Q3. In the hierarchy of classification, which grouping will have the smallest number of organisms with maximum common characteristics and which will have the largest number of organisms?
Answer:
Species has the smallest number of organisms with maximum common characteristics. Kingdom has the largest number of organisms with few common characteristics.
📝Page 88
Q1. Which division among plants has the simplest organisms?
Answer:
Thallophyta (algae) division has the simplest organisms among plants.
Q2. How are pteridophytes different from the phanerogams?
Answer:
Pteridophytes reproduce by spores and do not produce seeds, while phanerogams have well-developed reproductive organs and produce seeds.
Q3. How do gymnosperms and angiosperms differ from each other?
Answer:
Gymnosperms bear naked seeds not enclosed within a fruit, while angiosperms produce seeds enclosed inside fruits (they are flowering plants).
📝Page 94
Q1. How do poriferan animals differ from coelenterate animals?
Answer:
Poriferans are non-motile, have pores all over their bodies, minimal body design differentiation, and no tissue organization. Coelenterates show more body design differentiation, possess a body cavity, and have tissue-level organization with two cell layers.
Q2. How do annelid animals differ from arthropods?
Answer:
Annelids have segmented bodies with a true body cavity (coelom) and closed circulatory system. Arthropods are segmented animals with jointed legs, have an open circulatory system, and their coelomic cavity is filled with blood.
Q3. What are the differences between amphibians and reptiles?
Answer:
Amphibians have smooth, mucus-covered skin, and lay eggs in water. They respire through gills or lungs and have a three-chambered heart. Reptiles have dry, scaly skin, lay eggs with tough coverings on land, breathe only through lungs, and most have a three-chambered heart (except crocodiles, which have four).
Q4. What are the differences between animals belonging to the Aves group and those in the mammalia group?
Answer:
Aves are warm-blooded, lay eggs, have feathers and two forelimbs modified for flight, and have a four-chambered heart. Mammals are warm-blooded, have hair on their skin, possess mammary glands to nourish young, mostly give birth to live young, and also have four-chambered hearts.
SEBA Class 9 Science Chapter 7 – Diversity in Living Organisms Textbook Exercise Questions & Solutions | 2026–27
Q1. What are the advantages of classifying organisms?
Answer:
Classification helps in systematically identifying, studying, and understanding the vast diversity of life forms. It allows prediction of characteristics, simplifies the study of living organisms, aids in identification and nomenclature, and shows relationships among different organisms.
Q2. How would you choose between two characteristics to be used for developing a hierarchy in classification?
Answer:
I would choose the characteristic that affects the organism’s entire body design or structure as more fundamental for developing a hierarchy; less fundamental characteristics would be used later for further subdivisions.
Q3. Explain the basis for grouping organisms into five kingdoms.
Answer:
The basis for grouping organisms into five kingdoms
- Cell Structure –
Whether the organism is prokaryotic or eukaryotic. - Body Organisation –
Whether the organism is unicellular or multicellular. - Mode of Nutrition –
Whether the organism is autotrophic or heterotrophic. - Reproduction –
Whether reproduction is asexual or sexual. - Phylogenetic Relationships –
Evolutionary history and degree of relatedness among organisms.
Q4. What are the major divisions in the Plantae? What is the basis for these divisions?
Answer:
The major divisions in Plantae are Thallophytes, Bryophytes, Pteridophytes, Gymnosperms, and Angiosperms. The basis for these divisions is plant body differentiation, presence of vascular tissues, ability to produce seeds, and whether seeds are enclosed in fruits.
Q5. How are the criteria for deciding divisions in plants different from the criteria for deciding the subgroups among animals?
Answer:
Plant divisions are based mainly on structural organization, presence of conductive tissues, and seed formation. Animal subgroups are determined by increasing complexity in body design, presence or absence of tissues or organs, type of body cavity, and segmentation.
Q6. Explain how animals in Vertebrata are classified into further subgroups.
Answer:
In phylum Vertebrata, animals are classified into five groups based on body covering, reproduction, breathing, and temperature regulation. Pisces are aquatic, cold-blooded, with scales, fins, gills, and mostly lay eggs. Amphibia live on land and in water, have moist skin, breathe through gills, lungs, or skin, and lay eggs in water. Reptilia are cold-blooded, with dry scaly skin, breathe through lungs, and lay eggs with leathery shells. Aves are warm-blooded, with feathers, wings, lungs, and lay hard-shelled eggs. Mammalia are warm-blooded, have hair, produce milk, breathe through lungs, and mostly give birth to live young.
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