Samacheer Kalvi 6th Science Solutions Chapter 5 Pdf
Tamilnadu Board Samacheer Kalvi 6th Science Solutions Chapter 5: Tamilnadu State Board Solution Class 6 Science Chapter 5 – The World of Animals.
Samacheer Kalvi 6th Science Solutions Chapter 5: Overview
|
Board |
Samacheer Kalvi |
| Class |
6 |
|
Subject |
Science |
| Chapter |
5 |
|
Chapter Name |
The World of Animals |
Samacheer Kalvi 6th Science Solutions Chapter 5 Pdf
The World of Animals
Chapter 5
I.) Choose the correct answer.
1.) The study of living beings or organisms Is called
a.) Psychology
b.) Biology
c.) Zoology
d.) Botany
Answer: Biology
Solution: Biology refers to a branch of science that focuses on the study of living organisms and how they adapt to their environment.
2.) Which of the following are the Characteristics of living beings?
(I) Respiration
(ii) Reproduction
(iii) Adaptation
(iv) Excretion
Choose the correct one
a.) (i), (ii), and iv only
b.) (i), (ii) only
c.) (ii) and (iv)only
d.) (i), (iv), (ii) and (iii)
Answer: (i), (iv), (ii) and (iii)
Solution: Respiration, reproduction, adaptation and excretion are all necessary processes in living beings.
3.) Lizards breathe through their _________
a.) Skin
b.) gills
c.) Lungs
d.) trachea
Answer: Lungs
Solution: Lizards are reptiles and they breathe with the help of their lungs.
4.) All animals need
a.) Food and water only
b.) Water only
c.) Air, food and water
d.) Food only
Answer: Air, food and water
Solution: All living organism need air, food and water to survive. These are the basic necessities of life.
5.) Which animal has the special organs of Breathing called gills?
a.) Earthworm
b.) Fox
c.) Fish
d.) Frog
Answer: Fish
Solution: Unlike most of the animals who breathe in air through lungs, fishes have gills to take in oxygen underwater.
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: Aquatic plant, fish, frog, insects
Solution: Biotic components include all the living organisms , fauna and flora.
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.) A jungle with wild animals
Answer: Cultivated land with gazing cattle
Solution: A habitat can be defined as places where living organisms live and reproduce. Cultivated land is not a place where cattle lives but graze.
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: Hollow and light bones
Solution: The presence of hollow and light bones makes bird more light weighted and helps them to fly in the air.
9.) Paramecium moves from one place to Other with the help of ___________.
a.) Pseudopodia
b.) flagella
c.) Foot
d.) cilia
Answer: Cilia
Solution: Paramecium is an unicellular organisms and it Moves it’s body from one place to another with the help of Cilia.
10.) Kangaroo rat lives in
a.) Aquatic habitat
b.) Desert habitat
c.) Grass land habitat
d.) Mountain habitat
Answer: Desert Habitat
Solution: kangaroo rats are well adapted to the desert habitat.
II.) Fill in the blanks.
1.)Water bodies, deserts, mountains are Called __habitats__________
2.) Based on the number of cells present Animals are classified into __unicellular_____ And __multicellular____
3.) Tail of a bird acts as a rudder which Helps to __control direction_____
4.) Amoeba moves with the help of __pseudopodia____
III.) State True or False. If False correct the statement.
1.) Habitat is a living or dwelling place of An organism.
Answer: True
2.) The geographical features and Environmental conditions on earth Remain same from one place to Other.
Answer: False because environmental conditions are not constant, it differs from place to place and so does geographical features.
3.) Amoeba is a unicellular organism and it Moves with pseudopodia.
Answer: True
4.) Birds can see only one object at a Time.
Answer: False, they have binocular vision i.e they see one thing from one eye and other thing from another eye.
5.) Paramecium is a multicelluar organism.
Answer: False, Paramecium is a unicellular organism.
IV.) Complete the following.
1.) Tropical rain forests, grasslands and Deserts are known as ___habitats________
2.) Some living things are made of A single cell, called __unicellular________ Organism.
3.) The breathing organ of a fish is known As __gills_________
4.) The lizard ___moves_______ on the ground With its claw on its feet.
5.) Camel stores ____fat_______ in its hump.
V.) Answer very briefly.
1.) How do birds catch their prey?
Answer: The presence of clawed feet and powerful beak help birds to catch their prey.
2.) Where can we see camels in India?
Answer: Camels are found in the desert of Rajasthan in India.
3.) Name the locomotory organ of Amoeba.
Answer: The presence of a finger like projection called pseudopodia, in amoeba act as a locomotive Organ.
4.) What are the body parts of a snake?
Answer: Snakes have a head, body, eyes, mouth, nostrils and a tail.
5.) Which structure helps the bird to change its direction while flying in air?
Answer: Birds have tail that help them to change its direction while flying in air.
VI.) Answer briefly.
1.) Differentiate between unicellular and multicellular organisms.
Answer: (i) Unicellular organisms are not visible with Naked eyes, whereas we can see multicellular organisms all around us.
(ii) Unicellular organisms have special structures called organelles that help them perform all their physiological activities. On the other hand multicellular organisms have groups of cells and organs to carry out different functions in their body.
2.) Write the adaptive features of polar bear and penguin.
Answer: Adaptive features in polar bear include thick skin for protection and white fur.
Penguins on the other hand, walk with two legs and they have paddle to swim.
3.) Mention the features that help a bird to fly is the air?
Answer: To withstand the presence of air , birds have strong chest muscles and through flapping their wings they fly in the air.
4.) What are the adaptations seen in different types of vertebrates?
Answer: Types of adaptations seen in vertebrates are:
1) Fishes– streamlined body to move in water, gills to breathe underwater, slippery scales to protect the body and find for fast swimming.
2) Amphibian– e.g frog, have poikilothermic body that enable them to live in land and water. They breathe through gills in their Larval stage but later they tend to respire through skin, lungs and bucco-pharyngeal region.
3) Lizards– They breathe through lungs, are quadripedaland have powerful limbs. Their tail act as a counterweight. For grabbing and holding, they have sharp projections in their tongue.
4) Birds– They have streamlined body, strong forelimbs, light and hollow bones, strong chest muscles, all these help them to fly in air easily. Tail in birds help to control directions.
5) Camel– they can drink and store large amount of water in their body. Long legs to walk on hot desert. They do not sweat and passes small amount of urine etc.
VII.) Answer in detail.
1.) Describe the various features which help camel dwell well in the desert.
Answer: The following characteristics help camel to dwell well in the desert:
1) They can drink and store large amount of water in their body.
And they lose small amount of water from their body as they sweat and urine less.
2) To protect its body from heat , they have long legs and large and padded feet to easily walk on sand.
3) They store fats in their hump in case of emergency.
4) In order to avoid dust during sand Strom, they keep their nostrils closed.
5) To protect their eyes and ears from dust, they have long eyelashes and hairs.
