Classification of Animals ICSE Class-7th Concise Selina Biology Solutions Chapter-3 .We Provide Step by Step Answer of Objective, True False , Fill in the blanks , Match the following , Short/Long Answer Type of Exercise-3 Classification of Animals. Visit official Website CISCE for detail information about ICSE Board Class-7.
Classification of Animals ICSE Class-7th Concise Selina Biology Solutions Chapter-3
Review Questions
MULTIPLE CHOICE QUESTIONS
1. Tick (✓) the appropriate answer:
(i) Identify the aquatic animal with scaly skin which breathe with gills –
(a) Rohu
(b) Tortoise
(c) Sparrow
(d) Rat
Answer
Rohu
(ii) The unicellular organism causing malaria –
(a) Amoeba
(b) Paramecium
(c) Euglena
(d) Plasmodium
Answer
Plasmodium
(iii) Identify the animal which is not an Arthropoda —
(a) Prawn
(b) Butterfly
(c) Earthwonn
(d) Spider
Answer
Earthwonn
(iv) Scientist who introduced binomial nomenclature is —
(a) Charles Darwin
(b) Carolus Linnaeus
(c) Robert Hooke
(d) Gregor Mendel
Answer
Carolus Linnaeus
Short Answer Questions (Classification of Animals ICSE Class-7th)
1. Give two examples of each of the following
(i) Amphibians:
Ans. Amphibians: 1. Frog 2. Toad
(ii) Segmented worms:
Ans. Segmented worms: 1. Earthworm 2. Leech
(iii) Reptiles:
Ans. Reptiles: 1. Snake 2. Lizard
(iv) Coelenterates:
Ans. Coelenterates : 1. Hydra 2. Jellyfish
(v) Arthropods:
Ans. Arthropods: 1. Crab 2. Centipede
(vi) Flatworms:
Ans. Flatworms: 1. Tapeworm 2. Liverfluke
2. Give names of two animals which are found as parasites inside the human intestine.
Ans. (a) Tapeworm (b)Ascaris ’
3. Name one example each of an animal which shows the following characteristics:
(i) Fixed animals with a pore-bearing body:
Ans. Fixed animals with a pore-bearing body: sponge
(ii) Star-shaped body:
Ans. Star-shaped body: Star-fish
(iii) Can live in water as well as on land:
Ans. Can live in water as well as on land: Frog
(iv) Has a flattened ribbon-like body:
Ans. Has a flattened ribbon-like body: Tapeworm
4. Write one difference each between the following pairs:
(i) Porifera and Coelenterata.
(ii) Arthropoda and mollusca.
(iii) Invertebrates and Vertebrates
(iv) Platyheminthes and Nematoda
Answer:
(i) Porifera and Coelenterata.
Porifera
- Body is porous i. e. bears many tiny pores to draw water into the body cavity.
- e.g. Sponge
Coelenterata
- Sac-like body with only one opening i.e. mouth.
- e.g. Jelly fish, hydra,sea-anemone.
(ii) Arthropoda and mollusca.
Arthropoda
- These are animals with
- They have segmented body.
- They may or may not have wings
Example: Crab.
Mollusca
- Move with the help of a muscular foot.
- Soft body which is not segmented.
- Body enclosed in a hard shell Example: Octopus
(iii) Invertebrates and Vertebrates
Invertebrates
- The animals which do not have a back bone.
- They are further classified into nine groups.
Example: Octopus, Starfish.
Vertebrates
- The animals which have a back bone or a vertebral column.
- They are further classified in to five groups.
Example: Human Being, Lizard.
(iv) Platyheminthes and Nematoda
Platyheminthes
- Body thin and flattened.
- Mostly live as parasites in the bodies of other animals (hosts)
e.g. Tapeworm.
Nematoda
- Body is rounded and unsegmented.
- Mostly live as parasites in the body of animals including humans.
e.g. Roundworm commonly called Ascaris.
5. Match the animals given under column A with their respective classification group given under column B –
Column A Column B
6. Write the characteristics of class Aves with reference to their body covering and jaws.
Answer:
The characteristics of class Aves are:
- Body is covered with feathers.
- They have wings to aid flying
- scales on legs.
- They have no teeth.
- They have jaws provided with homy beaks.
7. Categorise the following animals under their appropriate columns of classification.
Answer:
Worms – Arthropods, Butterfly, Ascaris, Scorpion, Honey bee, Liverfluke, Leech, grasshopper, Eathworm
Molluscs – Snail
Fishes – Rohu
Amphibians – Toad, Frog
Reptiles – Snake, Lizard, Turtle
Birds – Parrot, Pigeon
Mammals – Rat, Bat, Dog, Cattle, Cow, Rabbit, Monkey, Elephant
— : end of Classification of Animals Solutions :–
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