• Home
  • Courses
  • Online Test
  • Contact
    Have any question?
    +91-8287971571
    contact@dronstudy.com
    Login
    DronStudy
    • Home
    • Courses
    • Online Test
    • Contact

      Class 9 Science

      • Home
      • All courses
      • Class 09
      • Class 9 Science
      CoursesClass 09ScienceClass 9 Science
      • 01.Matter in Our Surroundings
        9
        • Lecture1.1
          Matter and Its Properties 39 min
        • Lecture1.2
          States of Matter and Compressibility & Rigidity 21 min
        • Lecture1.3
          Moving through, Fluidity, Density, Diffusion, Pressure 26 min
        • Lecture1.4
          Change of State of Matter 56 min
        • Lecture1.5
          Evaporation and Boiling 39 min
        • Lecture1.6
          Cooling Effect of Evaporation Two More States of Matter 22 min
        • Lecture1.7
          Chapter Notes – Matter in Our Surroundings
        • Lecture1.8
          NCERT Solutions – Matter in Our Surroundings
        • Lecture1.9
          Revision Notes Matter in Our Surroundings
      • 02.Is Matter Around Us Pure
        9
        • Lecture2.1
          Elements and Compounds 20 min
        • Lecture2.2
          Mixtures, Homogeneous & Heterogeneous and Chemical & Physical Change 37 min
        • Lecture2.3
          Solution, Suspension, Colloid and Tyndal Effect 48 min
        • Lecture2.4
          Terms related to Solution and Solubility 42 min
        • Lecture2.5
          Separation of Mixtures 47 min
        • Lecture2.6
          Cleaning Drinking Water and Classification of Matter 29 min
        • Lecture2.7
          Chapter Notes – Is Matter Around Us Pure
        • Lecture2.8
          NCERT Solutions – Is Matter Around Us Pure
        • Lecture2.9
          Revision Notes Is Matter Around Us Pure
      • 03.Atoms and Molecules
        7
        • Lecture3.1
          Atom and its Properties, Atomic Mass, Molecule and Molecular Mass 40 min
        • Lecture3.2
          Ions, Valency and Writing the formulae of Compounds 47 min
        • Lecture3.3
          Mole Concept 42 min
        • Lecture3.4
          Calculation of no. of Moles, Percentage of an Element in a Compound and Laws of Chemical Combination 30 min
        • Lecture3.5
          Chapter Notes – Atoms and Molecules
        • Lecture3.6
          NCERT Solutions – Atoms and Molecules
        • Lecture3.7
          Revision Notes Atoms and Molecules
      • 04.Structure of The Atom
        7
        • Lecture4.1
          Charged Particles in Matter and Discovery of Sub – atomic Particles 31 min
        • Lecture4.2
          Atomic Model by J.J Thomson’s Model and Rutherford 57 min
        • Lecture4.3
          Ion, Mass Number, Isotopes, Isobar and Fractional Mass number of Elements 01 hour
        • Lecture4.4
          Electron Distribution in Orbits and Valency 01 hour
        • Lecture4.5
          Chapter Notes – Structure of The Atom
        • Lecture4.6
          NCERT Solutions – Structure of The Atom
        • Lecture4.7
          Revision Notes Structure of The Atom
      • 05.Cell - Fundamental Unit of Life
        7
        • Lecture5.1
          Introduction to Cell and Its Structure – Cell Wall 31 min
        • Lecture5.2
          Cell Membrane, Cytoplasm, Nucleus 32 min
        • Lecture5.3
          Ribosomes, Endoplasmic Reticulum, Golgi bodies, Lisosomes, Mitocondria 38 min
        • Lecture5.4
          Plastids, Vacuole; Types of Cell and Transport through Plasma Membrane 33 min
        • Lecture5.5
          Chapter Notes – Cell – Fundamental Unit of Life
        • Lecture5.6
          NCERT Solutions – Cell – Fundamental Unit of Life
        • Lecture5.7
          Revision Notes Cell – Fundamental Unit of Life
      • 06.Tissues
        8
        • Lecture6.1
          Division of Labour, Plant Tissues – Merismatic Tissue 20 min
        • Lecture6.2
          Plant Tissue-Permanent Tissue: Simple Permanent Tissue 34 min
        • Lecture6.3
          Plant Tissue-Permanent Tissue: Complex and Protective Tissue 31 min
        • Lecture6.4
          Animal Tissue- Muscular Tissue and Nervous Tissue 27 min
        • Lecture6.5
          Animal Tissue- Connective Tissue and Epithelial Tissue 42 min
        • Lecture6.6
          Chapter Notes – Tissues
        • Lecture6.7
          NCERT Solutions – Tissues
        • Lecture6.8
          Revision Notes Tissues
      • 07.Diversity in Living Organisms
        8
        • Lecture7.1
          Introduction to Biodiversity and Classification, Nomenclature 35 min
        • Lecture7.2
          The Five Kingdoms 29 min
        • Lecture7.3
          Plantae Kingdom 42 min
        • Lecture7.4
          Animalia Kingdom 01 hour
        • Lecture7.5
          Classification of Chordates and Revision of Animalia Kingdom 33 min
        • Lecture7.6
          Chapter Notes – Diversity in Living Organisms
        • Lecture7.7
          NCERT Solutions – Diversity in Living Organisms
        • Lecture7.8
          Revision Notes Diversity in Living Organisms
      • 08.Motion
        11
        • Lecture8.1
          Straight Line Motion, Position, Vector and Scalar; 23 min
        • Lecture8.2
          Distance & Displacement 48 min
        • Lecture8.3
          Speed and Velocity 57 min
        • Lecture8.4
          Acceleration and Deacceleration, Uniform & Non-uniform Acceleration 47 min
        • Lecture8.5
          Equations of Uniformly Accelerated Motion 58 min
        • Lecture8.6
          Uniform Circular Motion 30 min
        • Lecture8.7
          Graphical representation of Motion 30 min
        • Lecture8.8
          Calculations Using Graph 28 min
        • Lecture8.9
          Chapter Notes – Motion
        • Lecture8.10
          NCERT Solutions – Motion
        • Lecture8.11
          Revision Notes Motion
      • 09.Force and Newtons Laws of Motion
        12
        • Lecture9.1
          Force and Net or Resultant Force 46 min
        • Lecture9.2
          Newton’s 1st Law 46 min
        • Lecture9.3
          Momentum 46 min
        • Lecture9.4
          Newton’s 2nd Law 27 min
        • Lecture9.5
          Newton’s 2nd Law in Terms of Acceleration; 42 min
        • Lecture9.6
          Newton’s 1st Law from 2nd law and Practical Examples of Newton’s 2nd Law 42 min
        • Lecture9.7
          Newton’s 3rd Law and its Practical Examples 35 min
        • Lecture9.8
          Conservation of Momentum 33 min
        • Lecture9.9
          Practical Applications of Conservation of Momentum 29 min
        • Lecture9.10
          Chapter Notes – Force and Newtons Laws of Motion
        • Lecture9.11
          NCERT Solutions – Force and Newtons Laws of Motion
        • Lecture9.12
          Revision Notes Force and Newtons Laws of Motion
      • 10.Gravitation
        9
        • Lecture10.1
          Universal Law of Gravitation and Free Fall 41 min
        • Lecture10.2
          Falling Bodies: case 1 46 min
        • Lecture10.3
          Falling bodies: case 2 and Air Resistance 42 min
        • Lecture10.4
          Value of g, Mass and Weight, Weight on Moon, Circular Motion and Gravitation 48 min
        • Lecture10.5
          Thrust and Pressure and Pressure in fluids 37 min
        • Lecture10.6
          Archimedes Principle; Density 37 min
        • Lecture10.7
          Chapter Notes – Gravitation
        • Lecture10.8
          NCERT Solutions – Gravitation
        • Lecture10.9
          Revision Notes Gravitation
      • 11.Work and Energy
        7
        • Lecture11.1
          Work and Workdone Against Gravity, Oblique Displacement 01 hour
        • Lecture11.2
          Energy and Different Forms of Energy, Derivation of Formulae of K.E. 58 min
        • Lecture11.3
          Transformation of Energy and Law of Conservation of Energy 01 hour
        • Lecture11.4
          Rate of doing Work and Commercial Unit of Energy 43 min
        • Lecture11.5
          Chapter Notes – Work and Energy
        • Lecture11.6
          NCERT Solutions – Work and Energy
        • Lecture11.7
          Revision Notes Work and Energy
      • 12.Sound
        8
        • Lecture12.1
          Production and Propagation of Sound and Medium for Sound 30 min
        • Lecture12.2
          Frequency and Velocity of Sound Wave, Characteristic of Sound 01 hour
        • Lecture12.3
          Sonic Boom, Light faster than Sound, Reflection of Sound, Echo and Reverberation 56 min
        • Lecture12.4
          Types of Sound Based on Frequency 42 min
        • Lecture12.5
          Human Ear and Intensity of Sound 25 min
        • Lecture12.6
          Chapter Notes – Sound
        • Lecture12.7
          NCERT Solutions – Sound
        • Lecture12.8
          Revision Notes Sound
      • 13.Why do We Fall Ill
        7
        • Lecture13.1
          Factors Determining Health, Disease, Look of Disease, Cause of Disease, Types of Diseases 24 min
        • Lecture13.2
          Infectious Diseases, Immune System, Treatment of Diseases 55 min
        • Lecture13.3
          Prevention from Disease, Vaccination – Immunisation 36 min
        • Lecture13.4
          AIDS, Different Modes for Different Diseases 18 min
        • Lecture13.5
          Chapter Notes – Why do We Fall Ill
        • Lecture13.6
          NCERT Solutions – Why do We Fall Ill
        • Lecture13.7
          Revision Notes Why do We Fall Ill
      • 14.Natural Resources
        7
        • Lecture14.1
          Natural Resource-Air and its Pollution 57 min
        • Lecture14.2
          Natural Resource-Water and Soil and its Pollution 49 min
        • Lecture14.3
          Biogeochemical Cycles 33 min
        • Lecture14.4
          Green House Effect, Global Warming and Ozone Layer Depletion 30 min
        • Lecture14.5
          Chapter Notes – Natural Resources
        • Lecture14.6
          NCERT Solutions – Natural Resources
        • Lecture14.7
          Revision Notes Natural Resources
      • 15.Improvements in Food Resources
        7
        • Lecture15.1
          Various Revolution Held in India; Types of Crops; Crop Season; Crop Variety Improvement 31 min
        • Lecture15.2
          Crop Production Improvement 45 min
        • Lecture15.3
          Crop Protection Improvement and Organic Farming 29 min
        • Lecture15.4
          Animal Husbandry 40 min
        • Lecture15.5
          Chapter Notes – Improvements in Food Resources
        • Lecture15.6
          NCERT Solutions – Improvements in Food Resources
        • Lecture15.7
          Revision Notes Improvements in Food Resources

        NCERT Solutions – Diversity in Living Organisms

        Intext Questions

        Q.1     Why do we classify organisms?
        Sol.     There are millions of species on this earth. For anybody, it is impossible to study about each of them in his lifetime. Classification makes it easy to study the organisms; on the basis of certain common characters.


        Q.2     Give three examples of the range of variations that you see in life forms around you.
        Sol.     Three examples of the range of variations in life forms:
        – Ants, cockroaches, spiders, houseflies, etc. live in the same building. They look entirely different from each other yet all of them belong to arthropoda.
        – Humans, monkeys, cats and dogs lives in the same neighbourhood. They look entirely different yet all of them belong to mammalia.
        – A nearby park may show wide variety of plants; right from small grass to a giant banyan tree.


        Page 82

        Q.1     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?
        Sol.     The kind of cells an organism is made of is more basic characteristic of classifying organism because it gives a scientific angle to classification. Moreover, a particular dwelling place can be full of organisms of a wide variety.


        Q.2     What is the primary characteristic on which the first division of organisms is made?
        Sol.     Organisation of nucleus is the primary characteristic on which the first division of organisms is made. Based on this, organisms can be either prokaryotic or eukaryotic.


        Q.3     On what bases are plants and animals put into different categories?
        Sol.     Plants are autotrophs, while animals are heterotrophs. Cell wall is present in plant cells, while it is absent in animal cells. Plants do not need to move from one place to another, while most of the animals need to move in search of food.


        Page 83

        Q.1     Which organisms are called primitive and how are they different from the so-called advanced organisms?
        Sol.     An organism which is simple is called primitive. On the other hand, an organism with high level of division of labour; by formation of organs and organ system is called advanced.


        Q.2     Will advanced organisms be the same as complex organisms? Why?
        Sol.     Complexity in body design evolves because of necessity to adapt according to the changing environment. Hence, a complex organism would be an advanced one; in comparison to a simple organism.


        Page 85

        Q.1     What is the criterion for classification of organisms as belonging to kingdom Monera or Protista?
        Sol.     Organisms which are prokaryotes belong to the kingdom Monera. On the other hand, organisms which are eukaryotes and unicellular belong to the kingdom Protista.


        Q.2     In which kingdom will you place an organism which is single-celled, eukaryotic and photosynthetic?
        Sol.     Plant Kingdom


        Q.3     In the hierarchy of classification, which grouping will have the smallest number of organisms with a maximum of characteristics in common and which will have the largest number of organisms?
        Sol.       Species will have the smallest number of organisms with a maximum of characteristics in common. On the contrary, kingdom will have the largest number of organisms.


        Page 88

        Q.1     Which division among plants has the simplest organisms?
        Sol.       Thallophyta


        Q.2     How are pteridophytes different from the phanerogams?
        Sol.       In pteridophytes, the reproductive organs are hidden and they do not produce seeds. In phaenrogams, reproductive organs are conspicuous and they produce seeds.


        Q.3     How do gymnosperms and angiosperms differ from each other?
        Sol.       Seeds are naked in gymnosperms, while they are covered in angiosperms. Gymnosperms do not bear flowers, while angiosperms bear flowers.


        Page 94

        Q.1     How do poriferan animals differ from coelenterate animals?
        Sol.     In porifera, body has numerous pores, which are absent in coelenterates. Body has a cavity in coelenterates, while it is absent in porifera.


        Q.2     How do annelid animals differ from arthropods?
        Sol.     Segmented body in annelids, while true segmentation is absent in arthropods. Arthropods have joined appendages, which are absent in annelids.


        Q.3     What are the differences between amphibians and reptiles?
        Sol.     Amphibians need water to lay eggs and fertilization is external. Reptilians do not need water to lay eggs and fertilization is internal. Amphibians use both skin and lungs for breathing. Reptilians breathe through lungs only.


        Q.4     What are the differences between animals belonging to the Aves group and those in the mammalian group?
        Sol.     In aves, body is covered with feathers; while in mammals, body is covered with hairs. Mammary glands are absent in aves. Forelimbs of aves are modified into wings which is not the case in mammals. Aves are oviparous, while most of the mammals are viviparous.

        Exercise

        Q.1     What are the advantages of classifying organisms?
        Sol.     There are millions of species on this earth. For anybody, it is impossible to study about each of them in his lifetime. Classification makes it easy to study the organisms; on the basis of certain common characters.


        Q.2     How would you choose between two characteristics to be used for developing a hierarchy in classification?
        Sol.     We need to look at the fact if given character is present in a small number of organisms or a larger number of organisms. In the first case, the commonality of characters would represent a species. In the latter case, the commonality of characters would represent a higher taxa; like genus, family, order or phylum.


        Q.3     Explain the basis for grouping organisms into five kingdoms.
        Sol.     Following points explain the basis of grouping organisms into five kingdoms. Organization of nucleus: Organisms with unorganized nucleus are kept under the kingdom Monera. Those with organized nucleus are kept in other kingdoms.
        Number of cells:- Unicellular eukaryotes are kept in the kingdom Protista, while multicellular eukaryotes are kept in other kingdoms. Mode of nutrition and presence of cell wall: Hetereotrophic organisms in which cell wall is present are taken under the kingdom fungi. Autotrophic organisms in which cell wall is present are taken in the kingdom Plantae. Organisms in which cell wall is absent are taken in the kingdom Animalia.


        Q.4     What are the major divisions in the Plantae? What is the basis for these divisions?
        Sol.     The major divisions of Plantae and the basis for these divisions are as follows:
        – Thallophyta: Simple body design; with no differentiation into root, stem and leaves.
        – Bryophyta: Body is differentiated into stem and leaf-like structures. Vascular system is absent.
        – Pteridophyta: Body is differentiated into root, stem and leaves. Vascular system is present. Reproductive organs are nconspicuous. Seeds are not produced.
        – Gymnosperms: Seeds are naked.
        – Angiosperms: Seeds are covered.


        Q.5     How are the criteria for deciding divisions in plants different from the criteria for deciding the subgroups among animals?
        Sol.      In the plant kingdom, morphological characters are taken into consideration while deciding about the divisions. Morphology is the study of shapes and forms of various parts. In the animal kingdom, anatomical characters are taken into consideration while deciding about subgroups. Anatomy is the study of various organs’ design in animals.


        Q.6     Explain how animals in Vertebrata are classified into further subgroups.
        Sol.     Vertebrates are classified into further subgroups on following bases:
                   1. Pisces: The body is streamlined. Muscular tail is present which assists in locomotion. Body is covered with scales. Paired gills are present; which can breathe oxygen dissolved in water. They are cold-blooded animals. The heart has only two chambers. They lay eggs.

        2. Tetrapoda: Animals have four limbs for locomotion and hence the name tetrapoda. Tetrapoda is divided into four classes, viz. amphibia, reptilia, aves and mammalia.

        (a) Amphibia: These animals are adapted to live both in water and land. Mucus glands on skin keep the skin moist. The animals breathe through skin when in water and through lungs when on land. The heart has three chambers. These are cold blooded animals. Examples: Frog, toad, salamander, etc.

        (b) Reptilia: These animals show crawling movement for locomotion. Skin is hardened to form scales. Most of the reptilians have three chambered heart but crocodile has four-chambered heart. They don’t need water to lay eggs, rather eggs are covered with hard shells and laid on land. Examples: snakes, lizards, crocodile, turtle, etc.

        (c) Aves: The body is covered with feathers. Forelimbs are modified into wings. These are warm-blooded animals. The heart has four chambers. Bones are hollow (pneumatic); which assists in flying. All the birds belong to this class.

                   (d) Mammalia: The body is covered with hairs. Skin has seat glands and sebaceous glands. Mammary glands are present in females and are used for nourishing the young ones. Most of the mammalians give birth to young ones and are called viviparous. Some of the mammals lay eggs and are called oviparous. Examples: human, chimpanzee, lion, platypus, horse, etc.

        Exemplar

        Multiple Choice Questions

        Q.1 Find out incorrect sentence

        (a) Protista includes unicellular eukaryotic organisms

        (b) Whittaker considered cell structure, mode and source of nutrition for classifying the organisms in five kingdoms

        (c) Both Monera and Protista may be autotrophic and heterotrophic

        (d) Monerans have well defined nucleus

        Sol. (d)


        Q.2 Which among the following has specialized tissue for conduction of water?

        (i) Thallophyta

        (ii) Bryophyta

        (iii) Pteridophyta

        (iv) Gymnosperms

        (a) (i) and (ii)

        (b) (ii) and (iii)

        (c) (iii) and (iv)

        (d) (i) and (iv)

        Sol. (c )


        Q.3 Which among the following produce seeds?

        (a) Thallophyta

        (b) Bryophyta

        (c) Pteridophyta

        (d) Gymnosperms

        Sol. (d)


        Q.4 Which one is a true fish?

        (a) Jellyfish

        (b) Starfish

        (c) Dogfish

        (d) Silverfish

        Sol. (c )


        Q.5 Which among the following is exclusively marine?

        (a) Porifera

        (b) Echinodermata

        (c) Mollusca

        (d) Pisces

        Sol.  (b)


        Q.6 Which among the following have open circulatory system?

        (i) Arthropoda

        (ii) Mollusca

        (iii) Annelida

        (iv) Coelenterata

        (a) (i) and (ii)

        (b) (iii) and (iv)

        (c) (i) and (iii)

        (d) (ii) and (iv)

        Sol. (c)


        Q.7 In which group of animals, coelom is filled with blood?

        (a) Arthropoda

        (b) Annelida

        (c) Nematoda

        (d) Echinodermata

        Sol. (c)


        Q.8 Elephantiasis is caused by

        (a) Wuchereria

        (b) Pinworm

        (c) Planarians

        (d) Liver flukes

        Sol. (c)


        Q.9 Which one is the most striking or (common) character of the vertebrates?

        (a) Presence of notochord

        (b) Presence of triploblastic condition

        (c) Presence of gill pouches

        (d) Presence of coelom

        Sol. (a)

        Q.10 Which among the following have scales?

        (i) Amphibians

        (ii) Pisces

        (iii) Reptiles

        (iv) Mammals

        (a) (i) and (iii)

        (b) (iii) and (iv)

        (c) (ii) and (iii)

        (d) (i) and (ii)

        Sol.  (c)


        Q.11 Find out the false statement

        (a) Aves are warm blooded, egg laying and have four chambered heart

        (b) Aves have feather covered body, fore limbs are modified as wing and breathe through lungs

        (c) Most of the mammals are viviparous

        (d) Fishes, amphibians and reptiles are oviparous

        Sol. (d)


        Q.12 Pteridophyta do not have

        (a) Root

        (b) Stem

        (c) Flowers

        (d) Leaves

        Sol. (c)


        Q.13 Identify a member of porifera

        (a) Spongilla

        (b) Euglena

        (c) Penicillium

        (d) Hydra

        Sol.  (a)


        Q.14 Which is not an aquatic animal?

        (a) Hydra

        (b) Jelly fish

        (c) Corals

        (d) Filaria

        Sol. (d)


        Q.15 Amphibians do not have the following

        (a) Three chambered heart

        (b) Gills or lungs

        (c) Scales

        (d) Mucus glands

        Sol. (c)


        Q.16 Organisms without nucleus and cell organelles belong to

        (i) Fungi

        (ii) Protista

        (iii) Cyano bacteria

        (iv) Archae bacteria

        (a) (i) and (ii)

        (b) (iii) and (iv)

        (c) (i) and (iv)

        (d) (ii) and (iii)

        Sol. (b)


        Q.17 Which of the following is not a criterion for classification of living organisms?

        (a) Body design of the organism

        (b) Ability to produce one’s own food

        (c) Membrane bound nucleus and cell organelles

        (d) Height of the plant

        Sol.  (d)


        Q.18 The feature that is not a characteristic of protochordata?

        (a) Presence of notochord

        (b) Bilateral symmetry and coelom

        (c) Jointed legs

        (d) Presence of circulatory system

        Sol.  (c)


        Q.19 The locomotory organs of Echinodermata are

        (a) Tube feet

        (b) Muscular feet

        (c) Jointed legs

        (d) parapodia

        Sol. (a)


        Q.20 Corals are

        (a) Poriferans attached to some solid support

        (b) Cnidarians that are solitary living

        (c) Poriferans present at the sea bed

        (d) Cnidarians that live in colonies

        Sol. (d)


        Q.21 Who introduced the system of scientific nomenclature of organisms?

        (a) Robert Whittaker

        (b) Carolus Linnaeus

        (c) Robert Hooke

        (d) Ernst Haeckel

        Sol. (b)


        Q.22 Two chambered heart occurs in

        (a) Crocodiles

        (b) Fish

        (c) Aves

        (d) Amphibians

        Sol. (b)


        Q.23 Skeleton is made entirely of cartilage in

        (a) Sharks

        (b) Tuna

        (c) Rohu

        (d) None of these

        Sol. (a)


        Q.24 One of the following is not an Annelid

        (a) Nereis

        (b) Earthworm

        (c) Leech

        (d) Urchins

        Sol. (d)


        Q.25 The book Systema Naturae was written by

        (a) Linnaeus

        (b) Haeckel

        (c) Whittaker

        (d) Robert Brown

        Sol. (a)


        Q.26 Karl Von Linne was involved with which branch of science?

        (a) Morphology

        (b) Taxonomy

        (c) Physiology

        (d) Medicine

        Sol. (b)


        Q.27 Real organs are absent in

        (a) Mollusca

        (b) Coelenterata

        (c) Arthropoda

        (d) Echinodermata

        Sol.  (b)


        Q.28 Hard calcium carbonate structures are used as skeleton by

        (a) Echinodermata

        (b) Protochordata

        (c) Arthropoda

        (d) Nematoda

        Sol. (a)


        Q.29 Differentiation in segmental fashion occurs in

        (a) Leech

        (b) Starfish

        (c) Snails

        (d) Ascaris

        Sol. (a)


        Q.30 In taxonomic hierarchy family comes between

        (a) Class and Order

        (b) Order and Genus

        (c) Genus and Species

        (d) Division and Class

        Sol. (b)


        Q.31 5-Kingdom classification has given by

        (a) Morgan

        (b) R. Whittaker

        (c) Linnaeus

        (d) Haeckel

        Sol. (b)


        Q.32 Well defined nucleus is absent in

        (a) blue green algae

        (b) diatoms

        (c) algae

        (d) yeast

        Sol.  (a)


        Q.33 The ‘Origin of Species’ is written by

        (a) Linnaeus

        (b) Darwin

        (c) Hackel

        (d) Whittaker

        Sol. (b)


        Q.34 Meena and Hari observed an animal in their garden. Hari called it an insect while Meena said it was an earthworm. Choose the character from the following which confirms that it is an insect.

        (a) Bilateral symmetrical body

        (b) Body with jointed legs

        (c) Cylindrical body

        (d) Body with little segmentation ­­­­­ ­­­­­­ ­­­­­­­­­

        Sol. (b)

        ­­­­­

        Prev Chapter Notes – Diversity in Living Organisms
        Next Revision Notes Diversity in Living Organisms

        Leave A Reply Cancel reply

        Your email address will not be published. Required fields are marked *

        All Courses

        • Backend
        • Chemistry
        • Chemistry
        • Chemistry
        • Class 08
          • Maths
          • Science
        • Class 09
          • Maths
          • Science
          • Social Studies
        • Class 10
          • Maths
          • Science
          • Social Studies
        • Class 11
          • Chemistry
          • English
          • Maths
          • Physics
        • Class 12
          • Chemistry
          • English
          • Maths
          • Physics
        • CSS
        • English
        • English
        • Frontend
        • General
        • IT & Software
        • JEE Foundation (Class 9 & 10)
          • Chemistry
          • Physics
        • Maths
        • Maths
        • Maths
        • Maths
        • Maths
        • Photography
        • Physics
        • Physics
        • Physics
        • Programming Language
        • Science
        • Science
        • Science
        • Social Studies
        • Social Studies
        • Technology

        Latest Courses

        Class 8 Science

        Class 8 Science

        ₹8,000.00
        Class 8 Maths

        Class 8 Maths

        ₹8,000.00
        Class 9 Science

        Class 9 Science

        ₹10,000.00

        Contact Us

        +91-8287971571

        contact@dronstudy.com

        Company

        • About Us
        • Contact
        • Privacy Policy

        Links

        • Courses
        • Test Series

        Copyright © 2021 DronStudy Pvt. Ltd.

        Login with your site account

        Lost your password?

        Modal title

        Message modal