You can Download Samacheer Kalvi 6th Science Book Solutions Guide Pdf, Tamilnadu State Board help you to revise the complete Syllabus and score more marks in your examinations.
Tamilnadu Samacheer Kalvi 6th Science Solutions Term 1 Chapter 5 Living World of Animals
Samacheer Kalvi 6th Science Living World of Animals Textual Evaluation
I. Choose the appropriate answer
Question 1
The study of living things or organisms is called _______
(a) Psychology
(b) Biology
(c) Zoology
(d) Botany
Answer:
(b) Biology
Question 2
Which of the following are characteristics of living beings?
i. Respiration
ii. Reproduction
iii. Adaptation
iv. Excretion
Choose the correct sequence
a. i, ii, and iv only
b. i, ii only
c. ii and iv only
d. i, iv, ii and iii
Answer:
d. i, iv, ii and iii
Question 3
Lizards breathe through their _______
(a) Skin
(b) Gills
(c) Lungs
(d) Trachea
Answer:
(c) Lungs
Question 4
All animals need
a. Food and water only
b. Water only
c. Air, food and water
d. Food only
Answer:
d. Air, food and water
Question 5.
Which animal has the special organs of breathing called gills?
(a) Earthworm
(b) Fox
(c) Fish
(d) Frog
Answer:
(c) Fish
Question 6.
Choose the set that represents only biotic components of a habitat
a. Tiger, Deer, Grass, Soil
b. Rocks, Soil, Plants, Air
c. Sand, Turtle, Crab, Rocks
d. Aquatic plant, Fish, Frog, Insects
Answer:
d. Aquatic plant, Fish, Frog, Insects
Question 7.
Which of the following cannot be called as a habitat?
(a) A desert with camels
(b) A pond with fish and snails
(c) Cultivated land with grazing cattle
(d) Ajungle with wild animals
Answer:
(c) Cultivated land with grazing cattlel
Question 8.
Birds fly in the air with the help of
a. heavy and strong Bones
b. Soft and thick Bones
c. Hollow and light Bones
d. Flat and thick Bones
Answer:
c. Hollow and Light Bones
Question 9.
Paramecium moves from one place to other with the help of _______
(a) Pseudopodia
(b) Flagella
(c) Foot
(d) Cilia
Answer:
(d) Cillai
Question 10.
Kangaroo rat lives in
a. Aquatic habitat
b. Desert habitat
c. Grassland habitat
d. Mountain habitat
Answer:
b. Desert habitat
II. Multiple Choice Questions.
Complete the following with appropriate word(s).
- Aquatic, deserts, mountains are called _______
- Based on the number of cells present, animals are classified into _______ and _______
- Tail of a bird acts as a rudder which helps to .
- Amoeba moves with the help of _______
Answers:
- Habitats
- unicellular, multicellular
- control the direction of the movements
- Pseudopodia (false foot)
III. True or False, If False gives the correct answer.
Question 1.
A habitat is a living or dwelling place of an organism.
Answer:
True.
Question 2.
The geographical features and environmental conditions on earth remain the same from one place to another.
Answer:
False. The geographical features and environmental conditions on earth differ from one place to another.
Question 3.
Amoeba is a unicellular organism and moves with pseudopodia.
Answer:
True.
Question 4.
Birds can see only one object at a time.
Answer:
False. Birds can see two objects at a time. (Binocular vision)
Question 5.
Paramoecium is a multicellular organism.
Answer:
False. Paramoecium is a unicellular organism.
IV. Complete the following.
- Tropical rain forests, grasslands, and deserts are known as _______
- Some living things are made of a single cell, they are called _______ organism.
- The breathing organ of a fish is known as _______
- The lizard _______ on the ground with its claw on its feet.
- Camel stores _______ in its hump.
Answers:
- Habitats
- unicellular
- gills
- move
- fat
V. Very Short Answer Questions.
Question 1.
How do the birds catch their prey?
Answer:
The birds catch their prey with the help of a pair of clawed feet.
Question 2.
Where can we see Camels in India?
Answer:
We can see Camels in Rajasthan.
Question 3.
Name the locomotory organ of an amoeba.
Answer:
The locomotory organ of Amoeba is pseudopodia.
Question 4.
What are the body parts of a snake?
Answer:
Head, eyes, nostrils, mouth, belly, tail.
Question 5.
Which structure helps the bird to change its direction while flying in the air?
Answer:
The tail of the bird helps it to change direction while flying in the air.
VI. Short Answer Type Questions.
Question 1.
Differentiate between Unicellularand Multicellular organisms.
Answer:
Unicellular Organisms:
- They are made up of single cells.
- They can perform all the functions of life.
- They are very small (microscopic) in size
- They lack tissues, organs, and organ systems
- Growth occurs by an increase in the size of the cell.
- Eg. Amoeba, Paramecium, Euglena.
Mukkellubr Organisms
- They are made up of many cells.
- Different cells perform different functions.
- They are mostly large in size. They are seen through naked eyes.
- They are composed of tissues, and organ yems.
- Growth occurs by an increase in the number of cells by cell division.
- Eg. Earthworms, Fish, Frogs, Lizard and Human being.
Question 2.
Write the adaptive features of Polar bear and Penguin.
Answer:
Question 3.
Mention the feature that helps a bird to fly in the air.
Answer:
- Birds have a streamlined body covered with feathers.
- This body shape provides minimum resistance to air.
- They have a pair of wings that are modified forelimbs.
- They have hollow and light bones.
- They have strong chest muscles which help them withstand the pressure of the air while flapping their wings during flight.
Question 4.
What are the different types of invertebrates?
Answer:
- Sponges (Porifera)
- Comb jellies (Ctenophora)
- Hydras, jellyfishes, sea anemones, and corals (Cnidaria)
- Starfishes, sea urchins, sea cucumbers (Echinodermata)
- Flatworms (Platyhelminthes)
- Round or threadworms (Nematoda)
- Earthworms and leeches (Annelida)
- Insects and arachnids (Arthropoda)
- Snails, and octopuses (Mollusca)
VII. Answer in detail.
Question 1.
Describe the various features which help camel dwell well in the desert?
Answer:
- The camel has long legs which help it to keep its body away from the hot sand in the desert.
- A camel can drink a large amount of water (when it is available) and store it in the body.
- It passes a small amount of Urine. It does not sweat. It loses very little water from its body. So it can live for many days without drinking water.
- A camel’s hump has fat stored in it. In case of emergency, a camel can break down stored fat for nourishment.
- It has large and flat padded feet. So it walks easily on sand.
- Camel has long eyelashes and hairs to protect its eyes and ears from the blowing dust.
- It can keep its nostrils closed to avoid dust.
Samacheer Kalvi 6th Science Living World of Animals Intext Activities
Activity 1
Look at the above picture and prepare a chart for the following interpretation.
How does the climate differ in these habitats?
Name some animals that exist in these habitats.
Can an animal survive if it is shifted from one habitat to another contrasting habitat?
Answer:
In terrestrial habitat, the temperature is more. In water habitat, the temperature is less.
(i) Terrestrial habitat animals: Cow, Rabbit, Lizard.
(ii) Water habitat animals: Duck, fish.
No. For example, in the water habitat fish can live in. But in terrestrial habitat, it cannot survive, because of the adaptation.
Activity 2
Question 1.
Collect the pictures of various ecosystems like lakes, ponds, forests, deserts, mountains, and Polar regions and prepare a chart of animals in these places.
Answer:
Activity to be done by the students themselves
Samacheer Kalvi 6th Science Living World of Animals Additional Questions
I. Choose the correct answer.
Question 1.
Which is not a biotic community among the following?
(a) Plants
(b) Birds
(c) Air
(d) Elephant
Answer:
(c) Air
Question 2.
The locomotory organ of amoeba,
(a) pseudopodia
(b) cilia
(c) flagella
(d) None of these.
Answer:
(a) pseudopodia
Question 3.
Jurong Birds Park is located in
(a) America
(b) Singapore
(c) Japan
(d) Germany
Answer:
(b) Singapore
Question 4.
The animal that never drinks water,
(a) rat
(b) cat
(c) dog
(d) cow
Answer:
(a) rat
Question 5.
Lizards walk with four legs and it is known as
(a) Bipedal
(b) Tripedal
(c) Monopedal
(d) quadripedal
Answer:
(d) quadripedal
Question 6.
Vedanthangal is ………. sanctuary
(a) Birds sanctuary
(b) Tiger sanctuary
(c) Elephant sanctuary
(d) Deer sanctuary
Answer:
(a) Birds sanctuary
Question 7.
The movement of animals to a different location due to seasonal change is called
(a) Hibernation
(b) Aestivation
(c) Migration
(d) Adaptation
Answer:
(c) Migration
Question 8.
_______ can live for many days without drinking water.
(a) Dog
(b) Elephant
(c) Cow
(d) Camel
Answer:
(d) Camel
Question 9.
Camel passes _______ amount of urine.
(a) small
(b) large
(c) moderate
(d) too large
Answer:
(a) small
II. Complete the following.
- Living things are made of small units called ________
- Organisms that are made of many cells are called ________
- Unicellular Organisms are small, usually ________ nature, and cannot be seen with the naked eye.
- In Amobea ________ help in excretion.
- The fish has fins for ________
- ________ have web in the toes and able to glide or parachute the air and make soft landings.
- Birds have streamlined body covered with ________
- ________ is called the Ship of the Desert.
Answers:
- Cells
- multicellular organisms
- microscopics
- Contractile vacuoles
- Swimming
- Dinosaurs
- feathers
- Camel
III. True or false. If false give the correct answer.
Question 1.
Fishes are a unicellular organisms.
Answer:
False. Fishes are a multicellular organisms.
Question 2.
In Amoeba, reproduction is by simple diffusion through the body surface.
Answer:
False. In Amoeba, respiration is by simple diffusion through the body surface.
Question 3.
In unicellular organisms, the growth occurs by an increase in the size of the cell.
Answer:
True.
Question 4.
The streamlined body shape of fish helps it to move through the water easily.
Answer:
True
Question 5.
Some fishes have the capacity to rotate the head around the head joint.
Answer:
False. Some lizards have the capacity to rotate the head around the head joint.
Question 6.
The movement of animals to different locations due to the season changes is said to be an adaptation.
Answer:
False. The movement of animals to different locations due to the season changes is said to be Migration.
Question 7.
Spending the hot and dry period in an inactive state is known as Aestivation.
Answer:
True.
IV. Match the following.
Question 1.
- Polar bear – (a) Strong hooves for running, long hair to protect from cold
- Penguin – (b) Strong and fast runner has sharp claws to catch prey
- Mountain goat – (c) Paddle to swim, walk with two legs
- Lion – (d) Thick skin for protection, white fur
Answer:
- d
- c
- a
- b
Question 2.
- Bird – (a) stores water in the body
- Fish – (b) rotates its head around the head joint
- Lizard – (c) wings that are modified forelimbs
- Camel – (d) gills as respiratory organ lAns
Answer:
- – c
- – d
- – b
- – a
V. Complete the given analogy.
Question 1.
Fish : Water : : Elephant : _______
Answer:
Land
Question 2.
Euglena: Flagellum
_______ : Paramecium
Answer:
Cilia
Question 3.
Euglena: unicellular organism.
_______ : Multicellular organism
Answer:
Man
Question 4.
Fish respiratory organ : Gills
Bird’s Breathing organ: _______
Answer:
Lungs
Question 5.
Fins: Fish
Feather: _______
Answer:
Bird
Question 6.
Turtle: Hibernation
_______ : Aestivation
Answer:
Snail
Question 7.
Beak: Bird’s mouth
_______ : Fat stored in Camel.
Answer:
Hump
V. Short Answers.
Question 1.
List the locomotory organ of unicellular organisms.
Answer:
- Protozoa – pseudopodia
- Paramecium – cilia
- Euglena – flagellum
Question 2.
List any two differences between Paramecium and Euglena.
Answer:
Paramecium:
- Its locomotory organ is the cilia
- Absence of chloroplast
Euglena:
- Its locomotory organ is the flagellum
- Presence of chloroplast
Question 3.
What is meant by aestivation?
Answer:
Spending the hot and dry period in an inactive state is known as aestivation. (eg) Snail.
Question 4.
Mention the important adaptive features of fish.
Answer:
Gills is the respiratory organ of fish. It helps to absorb oxygen dissolved in water for breathing and not from the atmosphere. It is the adaptive feature of fish.
Question 5.
What is Binocular vision?
Answer:
At a time birds can see one object with one eye and another object with the other eye is. known binocular vision.
Question 6.
Define – Migration.
Answer:
When an animal moves its location as the season changes it is said to be Migration.
Question 7.
Which is called a ship of the desert? Why it is called so?
Answer:
Camel is called a ship of the desert.
A camel has large and flat padded feet which help it to walk easily on soft sand.
Question 8.
From which countries many birds migrate to our Vedanthangal?
Answer:
There are many birds from foreign countries like Siberia and Russia that migrate to our Vedanthangal.
VII. Long Answer.
Question 1.
Describe various adaptive features of birds.
Answer:
- Birds have a streamlined body covered with feathers.
- This body shape provides minimum resistance to air.
- They have beak instead of the mouth.
- They breathe through the lungs.
- They have hollow and light bones.
- The tail of the bird helps it to control the direction of the movements.
- They have strong chest muscles.
- They have binocular vision.
Question 2.
List the adaptation present in the lizard.
Answer:
- Lizards have strong four limbs.
- Lizards have the capacity to rotate the head around the head joint.
- They respire through the lungs.
- Lizards have teeth adapted for grabbing and holding.
- Some lizards have web in the toes and are able to glide or parachute the air and make soft landings.