Questions Answers

Evaluation

I.  Choose the correct answers

1. The study of living things or organisms is called

a. Psychology

b. Biology

c. Zoology

d. Botany

Answer: (b) Biology

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), (ii), (iii) and (iv)

Answer: (a) (i), (ii), and iv only

3. Lizards breathe through their

a. Skin

b. Gills

c. Lungs

d. Trachea

Answer: (c) Lungs

4. All animals need

a. Food and water only

b. Water only

c. Air, food and water

d. Food only

Answer: (c) Air, food and water

5. Which animal has the special organs of breathing called gills

a. Earthworm

b. Fox

c. Fish

d. frog

Answer: (c) Fish

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

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: (c) Cultivated land with grazing cattle

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

9. Paramecium moves from one place to other with the help of

a. Pseudopodia

b. Flagella

c. Foot

d. Cilia

Answer: (d) Cilia

10. Kangaroo rat lives in

a. Aquatic habitat

b. Desert habitat

c. Grass land habitat

d. Mountain habitat

Answer: (b) Desert habitat

II. Multiple choice questions

Complete the following with appropriate word(s).

1. Aquatic, deserts, mountains are called habitat.

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 controls the movement.

4. Amoeba moves with the help of  Pseudopodia.

III. True or False, If False give the correct answer.

1. Habitat is a living or dwelling place of organism. [True]

2. The geographical features and environmental conditions on earth remain same from one place to other. [False]

The geographical features and environmental conditions on earth remain differ from one place to other.

3. Amoeba is a unicellular organism and moves with pseudopodia. [True]

4. Birds can see only one object at a time. [False]

Birds can see only two object at a time.

5. Paramoecium is a multicelluar organism. [False]

Paramoecium is a unicelluar organism.

IV. Complete the following

1. Tropical rain forests, grasslands and desserts are known as habitat.

2. Some living things are made of a single cell, they are called unicelluar organism.

3. The breathing organ of a fish is known as gills.

4. The lizard run on the ground with its claw on its feet.

5. Camel stores fat in its hump.

V. Very short answer questions.

1. How do the birds catch their prey?

The birds catch their prey with help of beak and sharp claws.

2. Where can we see Camels in India?

In India camels we see in north western part. eg., Rajesthan

3. Name the locomotory organ of an Amoeba.

Pseudopodia is name of locomotory organ of an Amoeba.

4. What are the body parts of a snake?

The body parts of a snake are head, body and tail.

5. Which structure helps the bird to change its direction while flying in air?

A tail structure helps the bird to change its direction while flying in air.

VI. Short answer type questions.

1. Differentiate between Unicellular and Multicellular organisms.

Unicellular Organisms

• They are made up of single cell.

• The single cell of the organism can perform all the functions of life.

• These organisms are generally 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 and Euglena.

Multicellular Organisms

• They are organisms are made up of many cells.

• Division of labour exists among cells.

• Different cells are specialized to perform different functions.

• They are mostly large in size.

• They are composed of tissues, organs and organ systems.

• Growth occurs by an increase in the number of cells by cell division,

• eg. Earthworms, Fish, Frogs, Lizard and human beings.

2. Write the adaptive features of Polar bear and Penguin.

3. Mention the feature that help a bird to fly is the air?

Birds have strong chest muscles which help them withstand pressure of air while flapping their wings during flight

4. What are the different types of invertebrates?

Invertebrates are animals that neither possess nor develop a vertebral column derived from notochord.

Types of invertebrates:

• Arthropods

• Mollusca

• Annelida

• Coelenterata

VII. Answer in detail

1. Describe the various features which help Camel dwell well in the desert.

Features help Camel dwell well in the desert:

• The camel has long legs which help it to keep its body away from the hot sand in the desert.

• A camel can drink large amount of water (when it is available) and store it in the body.

• A camel’s body is adapted to save water in the dry desert as follows: A Camel passes small amount of urine; its dung is dry and it does not sweat. Since a camel loses very little water from its body, 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 nourshment.

• A camel has large and flat padded feet which help it to walk easily on soft sand. Thus it is called “The ship of the desert”.

• Camel has long eye lashes and hairs to protect its eyes and ears from the blowing dust.

• It can keep its nostrils closed to avoid dust.