NCERT Exemplar Solution Class 9 Science Chapter 7
NCERT Exemplar Solution Class 9 Science Chapter 7 Diversity In Living Organisms all Questions Answer Solution. NCERT Exemplar Class 9 Science Chapter 7 Solution PDF.
NCERT Exemplar Solution Class 9 Science Chapter 7: Overview
NCERT Exemplar Solution Class 9 Science Chapter 7 |
|
Board |
NCERT |
Topic |
Exemplar Problem Solution |
Class |
9 |
Subject |
Science |
Chapter |
7 |
Chapter Name |
Diversity In Living Organisms |
NCERT Exemplar Solution Class 9 Science Chapter 7 Diversity In Living Organisms
Multiple Choice Questions
1) Find out incorrect sentence
- Protista includes unicellular eukaryotic organisms
- Whittaker considered cell structure, mode and source of nutrition for classifying the organisms in five kingdoms
- Both Monera and protista may be autotrophic and heterotrophic
- Monerans have well defined nucleus
Answer:- d) Monerans have well defined Nucleus.
Moneransdoes not have well defined Nucleus. Well defined nucleus is the characteristics of the Eukaryotes. While the monerans includes prokaryotes.
2) Which Among the following has specialised tissue for conduction of water ?
- Thallophyta
- ii) Bryophyta
- iii) pteridophyta
- iv) Gymnosperms
- I and II
- II and III
- III and IV
- I and IV
Answer:- c) III and IV
Pteridophyta and gymnosperms have the specialized tissue for water conduction which is Xylem.
3) Which among the following produce seeds?
- Thallophyta
- Bryophyta
- Pteridophyta
- Gymnosperms
Answer:- d) Gymnosperms
Gymnosperms belongs to the highly modified species of the plants. Which have differentiated reproductive organs. It bears flowers and ultimately bears seeds.
4) Which one is a true fish?
- Jellyfish
- Starfish
- Dogfish
- Silverfish
Answer:- c) Dogfish
Dogfish is true fish.
Starfish- Echinodermata
Silver fish –Arthropods
Jelly fish – coelomate
5) Which among the following is exclusively marine?
- Porifera
- Echinodermata
- Mollusca
- Pieces
Answer:- b) Echinodermata
Echinodermata is exclusively marine. Other organisms are present in both marine as well as fresh water.
6) Which among the following have open circulatory system?
- Arthropoda
- Mollusca
- Annelida
- Coelenterates
- I and II
- III and IV
- I and III
- II and IV
Answer:- a) I and II
Arthopoda and Mollusca have open circulatory system. Other two have closed circulatory system.
7) In which group of animals, coelom is filled with blood?
- Arthropoda
- Annelida
- Nematoda
- Echinodermata
Answer:- a) Arthropoda
Arthropods have Coelom filled with blood. Other organisms Annelida , nematoda , and Echinodermata don’t contains blood.
8) Elephantiasis us caused by
- Wuchereria
- Pinworm
- Planarians
- Liver flukes
Answer:- a) Wuchereria
Wuchereria is the parasite which Is responsible for the disease elephantiasis. And it is spread by mosquitoes.
9) Which one of the most striking or (common) character of the vertebrates?
- Presence of notochord
- Presence of triploblastic condition
- Presence of grill pouches
- Presence of coelom
Answer:- a) presence of Notochord
Notochord is the common character among all the vertebrates. The other options are common characters for both vertebrates and invertebrates.
10) Which among the following have scales?
- Amphibians
- Pisces
- Reptiles
- Mammals
- I and III
- III and IV
- II and III
- I and II
Answer:- c) II and III
Pieces and reptiles have scales on their body. While amphibians and mammals have smooth skin or hairs and sweat glands .
Find out the false statement
- Aves are warm blooded, egg laying and have four chambered heart
- Aves have feather covered body, fore limbs are modified as wing and breathe through lungs
- Most of the mammals are viviparous
- Fishes, amphibians and reptiles are oviparous
Answer:- d) fishes, amphibians and reptiles are oviparous
Fishes and amphibians shows external fertilisation while the only reptiles are oviparous. Thus these statement is wrong.
2) Pteridophyta do not have
- Root
- Stem
- Flowers
- Leaves
Answer:- c) Flowers
Pteridophyta dies not bears flowers as they do not have differentiated sexual organs. Flowers are the characteristics of the gymnosperms.
3) Identify a member of porifera
- Spongilla
- Euglena
- Penicillium
- Hydra
Answer:- a) Spongilla
Spongilla belongs to Porifera. All the other belongs to another group. Penicillium belong to fungi, euglena belongs to protozoa and hydra belongs to coelenterata.
4) Which is not an aquatic animal?
- Hydra
- Jelly fish
- Corals
- Filaria
Answer:- d) Filaria
Filariais not the animal. It is disease caused by parasite wuchereria.
5) Amphibians do not have the following
- Three chambered heart
- Gills or lungs
- Scales
- Mucus glands
Answer:- c) Scales
Amphibians have smooth skin they do not have scales. Scales on the body is the feature of the reptiles. All the other given features are present in the amphibians so the scales is not present.
6) Organisms without nucleus and cell organelles belong to
- Fungi
- Protista
- Cyano bacteria
- Archae bacteria
- I and II
- III and IV
- I and IV
- II and III
Answer:- b) III and IV
Cyano bacteria and archae bacteria belongs to the prokaryotes type. Prokaryotic cell does not have well defined nucleus. It is the characteristics of the Eukaryotic cell.
7) Which of the following is not a criterion for classification of living organisms?
- Body design of the organism
- Ability to produce one’s own food.
- Membrane bound nucleus and cell organelles
- Height of the plant
Answer:- d) Height of the plant.
Classification of the Living organisms is dependent upon the body shape, finding of food, and the internal cell organelles. But it is not dependent upon the height and weight.
8) The feature that is not a characteristic of protochordata ?
- Presence of notochord
- Bilateral symmetry and coelom
- Jointed legs
- Presence of circulatory system
Answer:- c) jointed legs
Protochordata have all the features in it. Except the jointed legs . Jointed legs is the feature of arthropods.
9) The locomotory organs of Echinodermata are
- Tube feet
- Muscular feet
- Jointed legs
- Parapodia
Answer:- a) Tube feet
Echinodermata belongs to the Annelida. These have segmented body. also locomotion occurs with the tube feet.
10) Corals are
- Poriferans attached to some solid support
- Cnidarians, that are solitary living
- Poriferans present at the sea bed
- Cnidarians that live in colonies
Answer:- d) Cnidarians that live in Colonies
Corals are cnidarians which lives in the colonies.
11) Who introduced the system of scientific nomenclature of organisms
- Robert Whittaker
- Carolus Linnaeus
- Robert Hooke
- Ernest haeckel
Answer:- b) Carolus Linnaeus
Carolus Linnaeus introduced the system of scientific nomenclature of organisms. He gave the binomial nomenclature.
12) Two chambered heart occurs in
- Crocodiles
- Fish
- Aves
- Amphibians
Answer:- b) fish
All the other given organisms have 3 Chambered heart while the fish have two chambered heart.
13) Skeleton is made entirely of cartilage in
- Sharks
- Tuna
- Rohu
- None of these
Answer:- a) Sharks
Tuna and Rohu belongs to the bony fishes. But sharks are the Cartilaginous fish. These do not have bones.
14) One of the following is not an annelid
- Nereis
- Earthworm
- Leech
- Urchins
Answer:- d) Urchins
Earthworms, leech and nereis belongs to the group Annelida. As they all shows metamerically segmented body. But Urchins does not belong to it, it belongs to coelenterate.
15) The book system Naturae was written by
- Linnaeus
- Haeckel
- Whittaker
- Robert brown
Answer:- a) Linnaeus
The book Naturae was written by scientists Linnaeus.
16) Karl Von Linne was involved with which branch of science ?
- Morphology
- Taxonomy
- Physiology
- Medicine
Answer:- b) Taxonomy
Taxonomy is the branch of science which deals with the study of classification of animals. Karl won Linne was involved in the study of taxonomy.
17) Real organs are absent in
- Mollusca
- Coelenterata
- Arthropoda
- Echinodermata
Answer:- b) Coelenterata
Coelenterata lacks real organs. These organisms system is performed by the tissues. The other animals Mollusca, arthropods and Echinodermata have real organs.
18) Hard Calcium carbonate structures are used as skeleton
- Echinodermata
- Protochordata
- Arthropoda
- Nematoda
Answer:- a) Echinodermata.
Echinodermata is the marine species thus the body have hard covering of Calcium carbonate which is like the skeleton.It is also act as the prevention from the another animals.
19) Differentiation in segmental fashion occurs in
- Leech
- Starfish
- Snails
- Ascaris
Answer:- a) Leech
Annelida group have the feature of meteorically segmented body. That is their body is divided into segments. Leech belongs to Annelida. Thus it shows the differentiation in segmental fashion.
20) In taxonomic hierarchy family comes between
- Class and order
- Order and genus
- Genus and species
- Division and class
Answer:- b) order and genus
The taxonomic hierarchy is as below –
Kingdom
↓
Phylum
↓
Class
↓
Order
↓
Family
↓
Genus
↓
Species
These shows that family comes between order and genus.
21) kingdom classification has given by
- Morgan
- Whittaker
- Linnaeus
- Haeckel
Answer:- b) R. Whittaker
5 kingdoms classification which includes the Monera, Protista, fungi, plantae and animals. These classification was given by scientists R. Whittaker.
22) Well defined nucleus is absent in
- Blue green algae
- Diatoms
- Algae
- Yeast
Answer:- a) Blue green algae
Well defined Nucleus is the characteristics of the Eukaryotic organism. But blue green algae belongs to the prokaryotes. Thus it does not have well defined nucleus.
23) The ‘ origin of species’ is written by
- Linnaeus
- Darwin
- Haeckel
- Whittaker
Answer:- b) Darwin
Darwin is the writer of origin of species.
24) 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.
- Bilateral symmetrical body
- Body with jointed legs
- Cylindrical body
- Body with little segmentation
Answer:- b) body with jointed legs
All the insects belongs to the group Arthropods. Arthopoda have the feature of jointed legs to the body.
Short Answer Questions
Write True(T) or False (F)
1) Whittaker proposed five kingdom classification
Answer:- True
2) Monera is divided into Archaebacteriaand Eubacteria.
Answer:- True
3) Starting from class, species comes before the Genus.
Answer:- False
In Taxonomic hierarchy species comes after the genus. It is like-
Kingdom
↓
Phylum
↓
Class
↓
Order
↓
Family
↓
Genus
↓
Species
4) Anabaena belongs to the kingdom Monera.
Answer:- True
5) Blue green algae belongs to the kingdom Protista.
Answer:- False
Blue green algae does not belongs to kingdom Protista it belongs to the kingdom Monera.
6) All prokaryotes are classified under Monera.
Answer:- True
Fill in the blanks
1) Fungi shows _______ mode of nutrition.
Answer:- Fungi shows saprophytic mode of nutrition.
2) Cell wall of fungi is made up of ___________
Answer:- cell wall of fungi is made up of chitin
3) Association between blue green algae and fungi is called as _____________
Answer:- Association between blue green algae and fungi is called as lichens.
4) Chemical nature of chitin is __________.
Answer:- chemical nature of chitin is carbohydrates.
5) ___________ has smallest number of organisms with maximum number of similar characters .
Answer:- species has smallest number of organisms with maximum number of similar characters.
6) Plants without well differentiated stem, root and leaf are kept in_________.
Answer:- plants without well differentiated stem, root and leaf are kept in Thallophyta.
7) __________ are called as amphibians of the plant kingdom.
Answer:- Bryophytes are called as amphibians of the plant kingdom.
You are provided with the seeds of gram, wheat, rice, pumpkin, maize and pea. Classify them whether they are monocot or dicot.
Answer:-
Gram→ dicotyledonous
Wheat→ monocotyledons
Rice→ monocotyledons
Pumpkin→ dicotyledonous
Maize. → monocotyledons
Pea→ dicotyledonous
Match items of Column (A) with items of Column (B)
- (A) (B)
(a) Naked seed (A) Angiosperms
(b) Covered seed (B) Gymnosperms
(c) Flagella (C) Bryophytes
(d) Marchantia (D) Euglena
(e) Marsilea (E) Thallophyta
(f) Cladophora (F) Pteridophyta
(g) Penicillium (G) Fungi
Answer:-
Column (A)
|
Column (B)
Answers |
I) Naked seed
|
B) Gymnosperms |
II) covered seed
|
A Angiosperms |
III) Flagella
|
D) Euglena |
IV) Marchantia
|
C) Bryophytes |
V) marsilea
|
F) pteridophyta |
VI) Cladophora
|
E) Thallophyta |
VII Penicillium
|
G) Fungi |
Match items of Column (A) with items of Column (B)
(A) (B)
(a) Pore bearing animals (A) Arthropoda
(b) Diploblastic (B) Coelenterata
(c) Metameric segmentation (C) Porifera
(d) Jointed legs (D) Echinodermata
(e) Soft bodied animals (E) Mollusca
(f) Spiny skinned animals (F) Annelida
Answer:-
Column (A)
|
Column ( B)
Answers |
A) pore bearing
Animals |
III) Porifera |
B) Diplomatic
|
II) Coelenterata |
C) metameric
Segmentation |
VI) Annelida |
D) jointed legs
|
I Arthopoda |
E ) soft bodied
Animals |
V) Mollusca |
F spiny skinned
Animals |
IV) Echinodermata |
- Classify the following organisms based on the absence/ presence of true coelom (I.e. Acoelomate, pseudo coelomate and coelomate)
Answer:-
Spongilla→ Acoelomate
Sea anemone→ Acoelomate
Planeria→ Acoelomate
Liver fluke→ Acoelomate
Wuchereria→ pseudo coelomate
Ascaris→ pseudocoelomate
Nereis→ Coelomate
Earthworm. → Coelomate
Scorpion→ Coelomate
Birds→ Coelomate
Fishes→ Coelomate
Horse→ Coelomate
- Endoskeleton of fishes are made up of cartilage and bone; classify the following fishes as cartilaginous or bony
Answer:-
Torpedo→ Cartilaginous Fish
Sting ray→ Cartilaginous fish
Dog fish→ Cartilaginous fish
Rohu→ Bony fish
Angler fish → Cartilaginous fish
Exocoetus → Bony fish
- Classify the following based on number of chambers in their heart.
Answer:-
Rohu → 2 chambers
Scolidon→ 2 chambers
Frog. → 3 Chambers
Salamander→ 3 Chambers
Flying lizard → 3 Chambers
King cobra→ 3 Chambers
Crocodile→ 4 Chambers
Ostrich→ 4 Chambers
Pigeon → 4 Chambers
Bat→ 4 Chambers
Whale. → 4 Chambers
- Classify Into the cold blooded/ warm blooded animals.
Answer:-
Rohu→ Cold blooded
Scolidon→ cold blooded
Flyinglizard → cold blooded
Kingcobra→ cold blooded
Frog→ cold blooded
Salamander→ cold blooded
Ostrich. → warm blooded
Pigeon→ warm blooded
Bat. → warm blooded
Crocodile → cold blooded
Whale→ warm blooded
- Name two egg laying mammals.
Answer:- The two egg laying mammals are
Echidna and Billed Platypus.
Fill in the blanks
1) Five kingdom classification of living organisms is given by __________.
Answer:- Five kingdom classification of living organisms is given by Robert Whittaker .
2) Basic smallest unit of classification is ___________.
Answer:- Basic smallest unit of classification is species.
3) Prokaryotes are grouped in kingdom _________.
Answer:- Prokaryotes are grouped in kingdom Monera.
4) Paramecium are grouped in kingdom ___________.
Answer:- Paramecium are grouped in kingdom Eukaryotic unicellular organisms
5) Fungi do not contain ________.
Answer:- Fungi do not contain Chlorophyll.
6) A fungus __________ can be seen without microscope.
Answer:- A fungus Mushroom can be seen without microscope.
7) Common fungi used in preparing the bread is ___________.
Answer:- Common fungi used in preparing the bread is yeast .
8) Algae and fungi from symbiotic association called __________.
Answer:- Algae and fungi from symbiotic association called Lichens .
Give true (T) and False (F)
1) Gymnosperms differ from angiosperms in having covered seed.
Answer:-False
Angiosperms differ from gymnosperms in having covered seeds.
2) Non flowering plants are called Cryptogamae.
Answer:-True
3) Bryophytes have conducting tissue.
Answer:- False
Bryophytes don’t containconducting tissue.
4) Funaria is a moss.
Answer:- True
5) Compound leaves are found in many ferns.
Answer:- True
6) Seeds contain embryo.
Answer:- True
Give examples for the following.
1) Bilateral, dorsiventralsymmetry is found in ________.
Answer:- Bilateral, dorsiventral symmetry is found in liver fluke.
2) Worms causing disease elephantiasis is __________
Answer:- worms causing disease elephantiasis is filarial worm.
3) Open circulatory system is found in ___________ where coelomic cavity is filled with blood.
Answer:- Open circulatory system is found in Arthropods where coelomic cavity is filled with blood.
4) __________ are known to have pseudocoelom
Answer:- Nematodes are known to have pseudocoelom.
Label a,b, c, and d given in fig. 7.1 give the function of (b)
Answer:–
Dorsal fin
Caudal fin
Pelvic fin
Pectoral fin
In the boxes given in fig. 7.2 with appropriate characteristics/ plant group (s)
Answer:-
- Thallophyta
- Vascular tissue without specialisation
- Pteridophyta
- Bare naked seeds
- Angiosperms
- Seeds with two cotyledons
- Monocots
Long Answer Questions
Write names of few thallophytes. Draw a labelled diagram of Spirogyra.
Answer:-
The examples of the Thallophytes are as follows –
- Spirogyra
- Ulva
- Cladophora
- Chara
- Ulothrix
Diagram of Spirogyra
51) Thallophyta, Bryophyta and pteridophyta are called as ‘Cryptogams’. Gymnosperms and angiosperms are called as ‘phanerogams’. Discuss why? Draw one example of Gymnosperm.
Answer:-
Cryptogams and phanerogamsare the two clases of plants which depends upon the production of seeds . Thallophyta, Bryophyta and pteridophyta are included in the cryptogams which does not produce seeds. For example – pinus tree
Diagram of pinus
While the gymnosperms and angiosperms are the types of plants which are modified in the reproduction system. They have well differentiated reproduction parts. Which includes flowers and they bears seeds. And thus they finally forms the seeds.
For example – cycas
Diagram of cycas
52) Define the terms and give one example of each
a) Bilateral symmetry
Answer:- the symmetry in which the organism’s body is distributed into two equal parts or into two mirror images is known as bilateral symmetry. For example –liver fluke.
Liver fluke
- Coelom
Answer:- The body cavity filled with fluid is known as coelom. Coelomic fluid divide the body into outer part and inner part. For example – butterfly.
Butterfly
Triploblastic
Answer:- Triploblastic organisms are those which have 3 embryonic cell layers forming different tissues. For example – star fish
Starfish
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.
Answer:- All these organisms leech, nereis, Scolopendra, prawn, and Scorpion belongs to the different groups. The leech and nereis belongs to the annelid which have meteorically segmented body. These annelids have segmented body from head to tail it divided by the segments. Another organisms i.e. Scolopendra, prawn and Scorpion belongs to the Arthropods. Which have jointed legs. And also one feature of them is open circulatory system.
54) Which organism is more complex and evolved among bacteria, Mushroom and mango tree. Give reasons.
Answer:- The more complex and Evolved among the Bacteria, Mushroom and mango tree is Mango tree. Amoeba is an Bacteria which is prokaryotic and unicellular organisms, also it is heterotrophic. While the Mushroom is an fungi which is belongs to class Thallophyta. Fungi have no body differentiation and it is heterotrophic in nature. But Mango tree is Eukaryotic organism. It is multicellular. And Autotrophic i.e. it made its own food. And mango tree is Angiosperms with covered seed. These all the qualities are superior than the bacteria and fungi thus the Mangotree is more complex and evolved organism.
55) Differentiate between flying lizard and bird. Draw the diagram.
Answer:-
Flying lizard |
Birds |
1 ) these belongs to the group reptiles. | 1 ) these belongs to the group aves. |
2) these are cold blooded |
2) these are warm blooded |
3) flying lizard have heart with three chambers . |
3) birds have heart with four chambers. |
4) the body is covered with scales |
4) body is covered with feathers. |
5) have proper forelimb and hind limbs |
5) they have modified forelimbs into wings. |
Flying lizard (Draco)
Pigeon
56) List out some common features in cat, rat and bat.
Answer:- All the three rat, cat and batbelongs to the same class which is Mammalia.
Mammalia class have features as follows –
1} have heart with four chambers.
2} Mammalia have skin with hairs, also skin have sweat and oil glands are present in the skin.
3} all are multicellular.
4} all are Eukaryotes.
5} are warm blooded animals.
6} Mammalians have notochord at some stage of their age in life.
57) Why do we keep both snake and turtle in the same class?
Answer:– Both the turtle and the snake can be in the same class. Because they have some common features in them which is responsible for keeping them in same class. Both the snake and turtle are cold blooded animals. They both breathe through their lungs. They have scales on the body. Both are oviparous, they lay eggs with tough covers. And they both have three chambered heart. These common features keep them in same class.
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