Question 1

Question 1Look at the pictures and complete the table.

Accepted Answer

AnimalGroup to which it belongsWhere it livesTwo other members of the same groupOne characteristic feature of the groupNematodafreshwater, marine and terrestrial environment, lives in intestine as parasitepinworm, whipwormunsegmented cylindrical bodyAnnelidamoist soil, pond waterPolychaete, leechsegmented bodyMolluscafreshwater, marine and terrestrial environmentoctopus, squidsoft, unsegmented body with an outer hard shellArthropoda (insect)air and landant, houseflycompound eyesArthropoda (arachnida)terrestrialcockroach, scorpionsfour pairs of jointed limbsEchinodermataMarine waterbrittle star, sea urchinMouth on lower side and anus on upper sideArthropoda (crustacean)Marine and Fresh waterlobsters, shrimpsJointed legsAmphibialand and watertoad, salamanderThin, moist skin which may be smooth or roughAvesland and aircrow, sparrowBody covered with feathersReptilesterrestrialsnake, turtleDry skin covered with scales

Question 2

Question 4amphibians and pisces

Accepted Answer

Sl.No.PiscesAmphibians1.Pisces are aquatic.Amphibians can live on both land and water.2.Body of Pisces is smooth and slimy and is covered with scales for protection.Amphibians have thin, moist skin which may be smooth or rough.3.In Pisces, limbs are modified into fins.Amphibians have two pairs of limbs.4.Pisces have gills to breath.Amphibians breathe through lungs on land and through their moist skin in water.5.Pisces have two chambered heart.Amphibians have three chambered heart.

Question 3

Question 5aves and mammals

Accepted Answer

Sl.No.AvesMammals1.Aves lay eggs.Mammals give birth to babies.2.Aves have feathers on body.Mammals have hairs on their body.3.Aves have light bones with air cavities.Mammals have solid bones.4.Aves do not produce milk.Mammals produce milk and suckle their young ones.5.Aves do not have teeth.Mammals have teeth.

Question 4

Question 6warm-blooded and cold blooded animals

Accepted Answer

Sl.No.Warm-blooded animalsCold-blooded animals1.Body temperature of warm-blooded animals remains constant and is not affected by the temperature of their surroundings.Body temperature of cold-blooded animals changes with the temperature of their surroundings.2.For example: Mammals and BirdsFor example: Fish and Reptiles

Question 5

Question 7Give two characteristic features of birds which enable them to fly. Name any two birds which cannot fly.

Accepted Answer

Two characteristic features of birds which enable them to fly are:Their bones are hollow and light which make their body light.They have wings to fly.Two birds which cannot fly are Ostrich and Kiwi.

Question 6

Question 2Name one example each of an animal which shows the following characteristics:Fixed animal with a pore-bearing bodyStar-shaped bodyCan live in water as well as on landHas a flattened ribbon-like body

Accepted Answer

Fixed animal with a pore-bearing body — SpongeStar-shaped body — StarfishCan live in water as well as on land — FrogHas a flattened ribbon-like body — Tapeworm

Question 7

Question 3Match the animals given under column A with their respective classification group given under column B.Sl.No.Column AColumn B1.SpongeAmphibia2.SnailReptilia3.ButterflyEchinodermata4.ToadMollusca5.LizardArthropoda6.StarfishPorifera

Accepted Answer

Sl.No.Column AColumn B1.SpongePorifera2.SnailMollusca3.ButterflyArthropoda4.ToadAmphibia5.LizardReptile6.StarfishEchinodermata

Question 8

Question 4Categorise the following animals under their appropriate columns of classfication:ANIMALS :DogGrasshopperRatScorpionToadButterflyLizardTurtleFrogBatSnailHoney beePigeonLiverflukeLeechCattleSnakeRohuParrotAscarisEarthwormCowRabbitMonkeyElephant

Accepted Answer

CLASSIFICATION :WORMSMOLLUSCSFISHESAMPHIBIANSREPTILESBIRDSMAMMALSEarthwormSnailRohuFrogLizardPigeonDogLiverflukeToadSnakeParrotCattleLeechTurtleRatAscarisRabbitMonkeyBatElephantCowButterfly, Grasshopper, Honeybee and Scorpion are Arthropods.

Question 9

Question 5Animals cannot prepare their own food. What scientific name is given to such organisms.

Accepted Answer

The scientific name for such organisms is Heterotrophs.

Question 10

Question 6Identify the phylum/ class with the help of the following clues and give one example of each.Body is covered by a slimy and slippery skin.Body bears many tiny pores.Body has jointed legs.Animals swim with the help of fins.Body has special excretory organs called nephridia.

Accepted Answer

AmphibiaExample — FrogsPoriferaExample — SpongeArthropodaExample — CrabsPiscesExample — RohuAnnelidaExample — Earthworms

Question 11

Question 7Given below are sets of four terms. Choose the odd one and write the category of the remaining terms :Jellyfish, Dogfish, Sea anemone, HydraElectric ray fish, Dogfish, Starfish, SharkMyriapoda, Mammalia, Arachnida, CrustaceaTurtle, Tortoises, Crocodiles, FrogSucker, Tube feet, Muscular foot, Fins

Accepted Answer

Odd one — DogfishCategory of the remaining terms — CoelenterataOdd one — StarfishCategory of the remaining terms — PiscesOdd one — MammaliaCategory of the remaining terms — ArthropodaOdd one — FrogCategory of the remaining terms — ReptilesOdd one — FinsCategory of the remaining terms — Locomotory structures in invertebrates

Question 12

Question 8Correct the following statements by changing the first/ last word only :Amphibians breathe through lungs and gills.Slimy scales are found on the body of reptiles.Fins are covered and protected by an operculum.Ascaris is a segmented flatworm.Insects have four pairs of jointed legs.

Accepted Answer

Amphibians breathe through lungs and skin.Slimy scales are found on the body of fish.Gills are covered and protected by an operculum.Ascaris is an unsegmented roundworm.Arachnids have four pairs of jointed legs.

Question 13

Question 2Define the terms given below :HeterotrophsLocomotionInvertebratesVertebratesMammals

Accepted Answer

Heterotrophs — Heterotrophs are organisms that cannot produce their own food and obtain nutrients by consuming other organisms.Locomotion — Most animals move from one place to another mainly in search of food or shelter. Such a movement is called locomotion.Invertebrates — The animals that do not have a back bone are called invertebrates.Vertebrates — Animals with a backbone (vertebral column) are called vertebrates.Mammals — Mammals are animals that gives birth to young ones (babies), and feeds its young on milk from the mother's body. Mammals have body covered with hair, possess projecting external ears, have four limbs, and a tail (except humans).

Question 14

Question 3Write one important function of the following structures along with the group (phyla/ class) of animals in which they are found:TentaclesNephridiaGillsMuscular footMammary glands

Accepted Answer

Tentacles — Tentacles are found in Cnidarians. These finger-like projections surrounding the mouth, called tentacles help in catching food and swimming.Nephridia — Nephridia are found in Annelids. Nephridia are special organs for excretion.Gills — Gills are found in Class Pisces. Gills help fishes breathe.Muscular foot — Muscular foot is found in Molluscs. Mulluscs move with the help of a muscular foot.Mammary glands — Mammary glands are found in mammals (females). Young ones suckle milk from mammary glands present in mothers.

Question 15

Question 6(iii)Write one difference between Invertebrates and Vertebrates.

Accepted Answer

InvertebratesVertebratesThe animals that do not have a back bone are called invertebrates.The animals that have a back bone are called vertebrates.

Question 16

Question 6(iv)Write one difference between Platyhelminthes and Nematoda.

Accepted Answer

PlatyhelminthesNematodaTheir body is thin and flat.Their body is rounded and unsegmented.

Question 17

Question 10Bones with large air cavities are present incnidariansfishannelidsbirds

Accepted Answer

birdsReason — Birds have air cavities in their bones to make their body light.

Classification of Animals

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