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NCERT Exemplar Class 9 Science Chapter 7 Diversity in Living Organisms Solutions

NCERT Exemplar Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms covers all the important questions and answers as well as advanced level questions. It helps in learning about the biodiversity, classification, living organisms, their types, the classification of organisms, Classification System i.e. two kingdom classification and five kingdom classification, levels or groups and types of cellular organization.

The NCERT Exemplar solutions for class 9 science is very important in the examination. NCERT Exemplar Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms is provided by our experts. They prepared the best solutions which help the students in understanding the solutions in an easy way. This chapters also covers the other topics like body organization, mode of obtaining food, major identification patterns for classification, 5 kingdoms that are protista, monera, fungi, plantae and animalia, binomial nomenclature, five groups of plants which are thallophytes, bryophytes, pteridophytes, gymnosperms and angiosperms, Porifera, Coelenterata, Platyhelminthes, Nematoda, Annelida, Arthropoda, Mollusca, Echinodermata, Protochordates and Vertebrata


Chapter Name

Chapter 7 Diversity in Living Organisms

Book Title

NCERT Exemplar for Class 9 Science

Related Study

  • NCERT Solutions for Class 9 Science Chapter 7 Diversity in Living Organisms
  • Revision Notes for Class 9 Science Chapter 7 Diversity in Living Organisms
  • MCQ for Class 9 Science Chapter 7 Diversity in Living Organisms
  • Important Questions for Class 9 Science Chapter 7 Diversity in Living Organisms

Topics Covered

  • MCQ
  • Short Answers Questions
  • Long Answers Questions

NCERT Exemplar Solutions for Chapter 7 Diversity in Living Organisms Class 9 Science

Multiple Choice Questions

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.

Solution

(d) Monerans have well defined nucleus.

Monerans include single-celled prokaryotes, actinomycetes and photosynthetic blue-green algae. They don’t have well-defined nucleus and cell organelles.


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)

Solution

(c) (iii) and (iv)

Thallophytes and Bryophytes don’t have specialized tissues for water conduction whereas Pteridophytes and Gymnosperms have specialized tissues for conduction of water.


3. Which among the following produce seeds?
(a) Thallophyta
(b) Bryophyta
(c) Pteridophyta
(d) Gymnosperms

Solution

(d) Gymnosperms

Gymnosperms are the flowerless plants that produce seeds.


4. Which one is a true fish?
(a) Jellyfish
(b) Starfish
(c) Dogfish
(d) Silverfish

Solution

(c) Dogfish

Jellyfish is a coelenterate, starfish belongs to Echinodermata and silverfish is an Arthropod.


5. Which among the following is exclusively marine?
(a) Porifera
(b) Echinodermata
(c) Mollusca
(d) Pisces

Solution

(b) Echinodermata

Echinodermata are exclusively found in marine environment whereas Porifera, Molluscs and Pisces can be found in both marine and freshwater.


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)

Solution

(a) (i) and (ii)

Annelida and Coelenterata have closed circulatory system whereas Arthropods and Mollusca have open circulatory system.


7. In which group of animals, coelom is filled with blood?
(a) Arthropoda
(b) Annelida
(c) Nematoda
(d) Echinodermata

Solution

(a) Arthropoda

Annelida, Nematoda and Echinodermata don’t have blood whereas the coelom in Arthropods is filled with blood.


8. Elephantiasis is caused by :
(a) Wuchereria
(b) Pinworm
(c) Planarians
(d) Liver flukes

Solution

(a) Wuchereria

Wuchereria is a human parasite which causes Elephantiasis. Elephantiasis is spread through mosquitos.


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

Solution

(a) Presence of notochord

Vertebrates and invertebrates have triploblastic condition, gill pouches and coelom but notochord is exclusively present in vertebrates.


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)

Solution

(c) (ii) and (iii)

Amphibians and mammals do not have scales on their body whereas pisces and reptiles have scales on their body.


11. Find out the false statement :
(a) Ayes are warm blooded, egg laying and have four chambered heart.
(b) Ayes have feather covered body, forelimbs are modified as wing and breathe through lungs.
(c) Most of the mammals are viviparous.
(d) Fishes, amphibians and reptiles are oviparous.

Solution

(d) Fishes, amphibians and reptiles are oviparous.

Some fishes are viviparous but amphibians show external fertilization. Amphibians can neither be kept under oviparous nor be viviparous.


12. Pteridophyta do not have :
(a) Root
(b) Stem
(c) Flowers
(d) Leaves

Solution

(c) Flowers


13. Identify a member of porifera :
(a) Spongilla
(b) Euglena
(c) Penicillium
(d) Hydra

Solution

(a) Spongilla

Euglena is a protozoan. Pencillium is a fungi and hydra is a Coelenterata.


14. Which is not an aquatic animal?
(a) Hydra
(b) Jellyfish
(c) Corals
(d) Filaria

Solution

(d) Filaria

Filaria is a disease caused by Wuchereria.


15. Amphibians do not have the following :
(a) Three chambered heart
(b) Gills or lungs
(c) Scales
(d) Mucus glands

Solution

(c) Scales

Amphibians have a 3 chambered heart. Adults have lungs and tadpoles have gills. Mucus glands are present on the skin of amphibians.


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)

Solution

(b) (iii) and (iv)

Cyanobacteria and archaebacteria are prokaryotes and they do not have a well-defined nucleus and cell organelles. Fungi and Protista are Eukaryote which possess cell organelles and nucleus.


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

Solution

(d) Height of the plant

Height of a plant is related to bushes and trees which belong of Kingdom Plantae.


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

Solution

(c) Jointed legs

Protochordata are triploblastic with bilaterally symmetric body and coelom. At some stage of life they show notochord and they are marine living.


19. The locomotory organs of Echinodermata are :
(a) Tube feet
(b) Muscular feet
(c) Jointed legs
(d) Parapodia

Solution

(a) Tube feet

Tube feet in Echinodermata help in locomotion and respiration.


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

Solution

(d) Cnidarians that live in colonies


21. Who introduced the system of scientific nomenclature of organisms?
(a) Robert Whittaker
(b) Carolus Linnaeus
(c) Robert Hooke
(d) Ernst Haeckel

Solution

(b) Carolus Linnaeus

Carolus Linnaeus introduced binomial nomenclature which is simplified method of naming organisms. Binomial nomenclature gives each organism a scientific name that has two parts. First part is a Genus and second part is Species.


22. Two chambered heart occurs in :
(a) Crocodiles
(b) Fish
(c) Ayes
(d) Amphibians

Solution

(b) Fish

Amphibians have 3 chambered heart whereas aves and crocodiles have 4 chambered heart.


23. Skeleton is made entirely of cartilage in :
(a) Sharks
(b) Tuna
(c) Rohu
(d) None of these

Solution

(a) Sharks

Sharks are cartilaginous whereas tuna and rohu are bony fishes.


24. One of the following is not an Annelid :
(a) Nereis
(b) Earthworm
(c) Leech
(d) Urchins

Solution

(d) Urchins

Urchins are coelenterates.


25. The book Systema Naturae was written by :
(a) Linnaeus
(b) Haeckel
(c) Whittaker
(d) Robert Brown

Solution

(a) Linnaeus


26. Karl Von Linne was involved with which branch of science?
(a) Morphology
(b) Taxonomy
(c) Physiology
(d) Medicine

Solution

(b) Taxonomy


27. Real organs are absent in :
(a) Mollusca
(b) Coelenterata
(c) Arthropoda
(d) Echinodermata

Solution

(b) Coelenterata

Coelenterates are at the tissue level of organization and thus they lack real organs.


28. Hard calcium carbonate structures are used as skeleton by :
(a) Echinodermata
(b) Protochordata
(c) Arthropoda
(d) Nematoda

Solution

(a) Echinodermata

Echinodermata are exclusively free-living marine animals with spiny skin. They are triploblastic and have a coelomic cavity. They use a unique water-driven tube for moving and also contain calcium carbonate structures which are used as skeletons.


29. Differentiation in segmental fashion occurs in :
(a) Leech
(b) Starfish
(c) Snails
(d) Ascaris

Solution

(a) Leech

Leech belongs to kingdom Annelids and it shows metameric body segmentation.


30. In taxonomic hierarchy family comes between :
(a) Class and Order
(b) Order and Genus
(c) Genus and Species
(d) Division and Class

Solution

(b) Order and Genus


31. 5-Kingdom classification has given by :
(a) Morgan
(b) R. Whittaker
(c) Linnaeus
(d) Haeckel

Solution

(b) R. Whittaker

R. Whittaker proposed 5 kingdom classification which includes Monera, Protista, Fungi, Plantae and Animalia.


32. Well defined nucleus is absent in :
(a) blue green algae
(b) diatoms
(c) algae
(d) yeast

Solution

(a) blue green algae

Blue-green algae belong to kingdom prokaryotes which do not have well defined nucleus and cell organelles.


33. The ‘Origin of Species’ is written by :
(a) Linnaeus
(b) Darwin
(c) Haeckel
(d) Whittaker

Solution

(b) Darwin


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

Solution

(b) Body with jointed legs

Kingdom Arthropoda has the characteristic feature of body with joined legs and all the insects belong to this kingdom.


Short Answer Questions

35 Write true (T) or false (F) :
(a) Whittaker proposed five kingdom classifications.
(b) Monera is divided into Archaebacteria and Eubacteria.
(c) Starting from Class, Species comes before the Genus.
(d) Anabaena belongs to the kingdom Monera.
(e) Blue green algae belong to the kingdom Protista.
(f) All prokaryotes are classified under Monera.

Solution

(a) True

(b) True

(c) False

(d) True

(e) False

(f) True


36. Fill in the blanks :
(a) Fungi shows _____ mode of nutrition.
(b) Cell wall of fungi is made up of _____
(c) Association between blue green algae and fungi is called as _____
(d) Chemical nature of chitin is _____
(e) _____ has smallest number of organisms with maximum number of similar characters.
(f) Plants without well differentiated stem, root and leaf are kept in _____
(g) _____ are called as amphibians of the plant kingdom.

Solution

(a) saprophytic,
(b) Chitin,
(c) lichens,
(d) carbohydrates,
(e) Species,
(f) thallophyta,
(g) Bryophytes


37. You are provided with the seeds of gram, wheat, rice, pumpkin, maize and pea. Classify them whether they are monocot or dicot.

Solution

Gram – dicot

Wheat – monocot

Rice – monocot

Pumpkin – dicot

Maize – monocot

Pea – dicot


38. Match items of column A with items of column B.

 

Column A

 

Column B

1.

Naked eye

(a)

Angiosperms

2.

Covered seed

(b)

Gymnosperms

3.

Flagella

(c)

Bryophytes

4.

Marchantia

(d)

Euglena

5.

Marsilea

(e)

Thallophyta

6.

Cladophora

(f)

Pteridophyta

7.

Penicillium

(g)

Fungi

Solution

 

Column A

 

Column B

1.

Naked eye

(a)

Gymnosperms

2.

Covered seed

(b)

Angiosperms

3.

Flagella

(c)

Euglena

4.

Marchantia

(d)

Bryophytes

5.

Marsilea

(e)

Pteridophyta

6.

Cladophora

(f)

Thallophyta

7.

Penicillium

(g)

Fungi


39. Match items of column A with items of column B :

 

Column A

 

Column B

1.

Pore bearing animals

(a)

Arthropoda

2.

Diploblastic

(b)

Coelenterata

3.

Metameric segmentation

(c)

Porifera

4.

Jointed legs

(d)

Echinodermata

5.

Soft bodied animals

(e)

Mollusca

6.

Spiny skinned animals

(f)

Annelida

Solution

 

Column A

 

Column B

1.

Pore bearing animals

(a)

Porifera

2.

Diploblastic

(b)

Coelenterata

3.

Metameric segmentation

(c)

Annelida

4.

Jointed legs

(d)

Arthropoda

5.

Soft bodied animals

(e)

Mollusca

6.

Spiny skinned animals

(f)

Echinodermata


40. Classify the following organisms based on the absence/presence of true coelom (i.e., acoelomate, pseudocoelomate and coelomate) : Spongilla, Sea anemone, Planaria, Liver fluke, Wuchereria, Ascaris, Nereis, Earthworm, Scorpion, Birds, Fishes, Horse.

Solution

Spongilla – Acoelomate,

Sea anemone – Acoelomate

Planaria – Acoelomate,

Liver fluke – Acoelomate

Wuchereria – Pseudocoelomate,

Ascaris – Psudocoelomate

Nereis – Coelomate,

Scorpion – Coelomate

Earthworm – Coelomate,

Birds, Fishes and Horse – Coelomate


41. Endoskeleton of fishes are made up of cartilage and bone; classify the following fishes as cartilagenous or bony : Torpedo, Sting ray, Dog fish, Rohu, Angler fish, Exocoetus.

Solution

Torpedo – Cartilagenous,

Sting ray – Cartilagenous

Dog fish – cartilagenous,

Rohu – Bony

Angler fish – Cartilagenous,

Exocoetus – Bony


42. Classify the following based on number of chambers in their heart :
Rohu, Scoliodon, Frog, Salamander, Flying lizard, King Cobra, Crocodile, Ostrich, Pigeon, Bat, Whale.

Solution

  • Rohu-2 chambered
  • Scoliodon-2 chambered
  • Frog-3 chambered
  • Salamander-3 chambered
  • Flying lizard-3 chambered
  • King Cobra-3 chambered
  • Crocodile-4 chambered
  • Ostrich-4chambered
  • Bat-4chambered
  • Whale-4 chambered


43. Classify Rohu, Scoliodon, Flying lizard, King Cobra, Frog, Salamander, Ostrich, Pigeon, Bat, Crocodile and Whale into the cold blooded/warm blooded animals.

Solution

  • Rohu-Cold Blooded
  • Scolidon-Cold Blooded
  • Flying lizard-Cold Blooded
  • King Cobra-Cold Blooded
  • Frog-Cold Blooded
  • Salamander-Cold Blooded
  • Ostrich-Warm Blooded
  • Pigeon-Warm Blooded
  • Bat-Warm Blooded
  • Crocodile-Cold Blooded
  • Whale-Warm Blooded


44. Name two egg laying mammals.

Solution

Billed platypus and the echidna are two egg-laying mammals


45. Fill in the blanks :
(a) Five kingdom classification of living organisms is given by _____
(b) Basic smallest unit of classification is _____
(c) Prokaryotes are grouped in Kingdom _____
(d) Paramecium is a protista because of its _____
(e) Fungi do not contain _____
(f) A fungus _____ can be seen without microscope.
(g) Common fungi used in preparing the bread is _____
(h) Algae and fungi form symbiotic association called_____

Solution

(a) Robert whittaker,
(b) species,
(c) monera,
(d) eukaryotic unicellular, mobile organisms,
(e) chlorophyll,
(f) mushroom,
(g) yeast,
(h) lichens.


46. Give True (T) and False (F) :
(a) Gymnosperms differ from Angiosperms in having covered seed.
(b) Non-flowering plants are called Cryptogamae.
(c) Bryophytes have conducting tissue.
(d) Funaria is a moss.
(e) Compound leaves are found in many ferns.
(f) Seeds contain embryo.

Solution

(a) False,
(b) True,
(c) False,
(d) True,
(e) True,
(f) True,


47. Fill in the blanks :
(a) Bilateral, dorsiventral symmetry is found in _____
(b) Worms causing disease elephantiasis is _____
(c) Open circulatory system is found in _____ where coelomic cavity is filled with blood.
(d) _____ are known to have pseudocoelom.

Solution

(a) liver fluke,
(b) filarial worm,
(c) anthropods,
(d) Nematodes.


48. Label a, b, c and d given in the figure. Give the function of b.

Solution

(a) Dorsal fin

(b) Caudal fin

(c) Pelvic fin

(d) Pectoral fin

Function of Caudal fin: Caudal fin helps in streamlined movement in water.


49. Fill in the boxes given in figure with appropriate characteristics/plant group (s) :

Solution
(a) Thallophyta,
(b) Without specialized vascular tissue,
(c) Pteridophyta,
(d) Phanerogams,
(e) Bear naked seeds,
(f) Angiosperms,
(g) Have seeds with two cotyledons,
(h) Monocots


Long Answer Questions

50. Write names of few Thallophytes. Draw a labelled diagram of Spirogyra.

    Solution

    Ulva, Spirogvra, Cladophora, Ulothrix, Chara are the some examples of Thallophyta.


    51. Why are Thallophyta, bryophyta and pteridophyta called ‘Cryptogams’ while Gymnosperms and Angiosperms are called ‘phanerogams’? Draw one example of Gymnosperm.

    Solution

    Thallophyta, bryophyta and pteridophyta are called ‘Cryptogams’ because the reproductive organs of plants in all these three group is hidden and plants do not bear flowers or seeds. On the other hand ‘Phanerogams’ are flowering and bear seeds. It includes gymnosperms and angiosperms which have well-differentiated reproductive tissue that finally make seeds. Seeds are the result of the reproductive process. Seeds consist of the embryo along with stored food, which serves for the primary growth of the embryo during germination.


    52. Define the terms and give one example of each :
    (a) Bilateral symmetry
    (b) Coelom
    (c) Triploblastic

    Solution

    (a) Bilateral symmetry: When the body have similar parts fixed around a common central axis. Parts of these animals at any point of radius have similar structure to that of other. The left and the right halves of the body are same in bilateral symmetry. The organisms which possess this type of symmetry are called bilaterally symmetrical organisms, e.g. butterfly, human, crab.

    (b) Coelom: A coelom is fluid-filled body cavity that lies in between the body wall and alimentary canal. It is typically found in multicellular organisms.

    (c) Triploblastic: Triploblastic animals are the animals whose cells body develops from three layers : the outer ectoderm, inner endoderm and the third germinal layer mesoderm which is in between outer ectoderm and the endoderm.
    Example : Tapeworm.


    53. You are given Leech, Nereis, Scolopendra, Prawn and Scorpion; and all have segmented body organisation. Will you classify them in one group? If no, give the important characters based on which you will separate these organisms into different groups.

    Solution

    All the given organisms do not belong to same group. Leech and Nereis belong to phylum annelida because as their body is bilaterally symmetrical and triploblastic. They have elongated and segmented body and bear lateral appendages for locomotion. They have true body cavity. Colopendra, Prawn and Scorpion belong to phylum arthropoda as these are bilaterally symmetrical, segmented animals having jointed legs and an open circulatory system.


    54. Which organism is more complex and evolved among Bacteria, Mushroom and Mango tree. Give reasons.

    Solution

    Among these mango tree is the most complex, second most complex is the mushroom, and the bacteria are the least complex. Bacteria are generally having single cell. They are prokaryotic and some of the simplest life forms on the planet (example : bacteria). But mushroom is more complex than the bacteria. Mushroom is heterotrophic, eukaryotic and simple thallophyte with no tissue systems. Mango tree is eukaryotic, autotrophic and multicellular plant. It is an angiosperm in which seeds are produced inside the fruit and flowers are formed. It is a complete plant.


    55. Differentiate between flying lizard and bird. Draw the diagram.

    Solution

    Flying Lizards

    Birds

    It belongs to group reptiles.

    It belongs to group ayes

    It is cold blooded.

    Birds are warm blooded

    Its body covered with scales.

    It persist on the feet but have outside covering of feathers.

    Flying lizards have three chambered heart.

    Birds have four-chambered heart.

    Teeth are present in all reptiles except in tortoises and turtles.

    Narrow jaws form a horny beak, which is modified for different purpose. Teeth are absent.


    56. Write some common features in cat, rat and bat.

    Solution

    Bat, rat and cat belong to class Mammalia and have following common features :

    1. All are multicellular animals.
    2. All have notochord at some stage of life cycle.
    3. Mammals are warm-blooded animals with four- chambered hearts.
    4. They have mammary glands for the production of milk to nourish their young ones.
    5. Their skin has hairs as well as sweat and oil glands.
    6. All the three mammals given above produce live young ones.
    7. All are heterotrophic in nature.
    8. All have paired gill pouches.


    57. Why do we keep both snake and turtle in the same class?

    Solution

    Both turtle and snake are kept in the same class because they have the following common features:

    1. Both the animals are cold-blooded
    2. They have scales and breathe through lungs
    3. They belong to Reptilia group.
    4. Most of the animals in this group have three- chambered heart except crocodiles which have four chambered heart.
    5. They lay eggs with tough coverings.

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