Class 5 Science Lesson 4

Exercise-1 (Classification of Living Beings)

1. If the statement is correct, put (✓); if wrong, put (×):

(a) Fish breathe through gills.  ✓

(b) Animals that live in both water and land are called reptiles.  ×

(c) Gecko (Wall lizard) breathes through lungs.  ✓

(d) The body of the bird is covered with hair.  ×

(e) Mammals give birth.  ✓

2. Fill in the blanks with appropriate words:

(a) Animals with backbones are called  vertebrates.

(b) Fish swims in water with the help of  fins.

(c) The webbed feet of a frog helps it to  swim.

(d) Snake crawls on the ground.

(e) A monkey breastfeeds its baby.

3. Match the body covering parts and the animals:

Body Covering	Animal
A. Soft moist skin	b. Frog
B. Scales	a. Crab
C. Hair	f. Cat
D. Dry hard scales	c. Tortoise
E. Feathers	d. Lophophorus

4. Choose the correct option:(a) Which animal gives birth to babies?

👉 iii. bat

(b) Which animal’s body is covered with dry, hard scales?

👉 ii. snake

(c) Which animal does not have a neck?

👉 iv. frog

(d) Which animal does not have teeth?

👉 iii. pigeon

(e) Which organ helps frog to swim in water?

👉 iv. webbed feet

5. Answer the following questions:

(a) What do birds use feet for?

👉 Birds use their feet for walking, running, catching prey, perching, and swimming (in case of aquatic birds).

(b) In which condition does a frog breathe with gills, skin, and lungs?

👉 A frog breathes with gills in its tadpole stage, with skin in water as an adult, and with lungs when it is on land.

(c) How do the different body parts of the bird help the bird to fly?

👉 Birds have a streamlined body, light bones, feathers, and strong muscles. Their wings help them to fly, while air sacs make their body light for flying.

(d) Draw a picture of a fish and a bird showing their main characteristics. Name the parts.

👉 (User should draw a labeled diagram showing fins, gills, tail in fish; and beak, wings, feathers in bird.)

(e) Most reptiles have two pairs of legs but snakes have no legs. Why is a snake placed in the reptile group?

👉 Snakes are placed in the reptile group because their body is covered with dry hard scales and they lay eggs on land and breathe through lungs like other reptiles.

(f) Identify the group of animals with the following characteristics:

i. Laying eggs on land, breathing with lungs, covered with dry hard scales

👉 Reptiles

ii. Body covered with hair, give birth to babies, breastfeed

👉 Mammals

iii. Body with scales and fins, breathing with gills

👉 Pisces (Fish)

iv. Two pairs of legs, soft moist skin, and lungs and skin for respiration

👉 Amphibians

v. Boat-shaped body, light bones, breathing with lungs

👉 Birds (Aves)

Parts of a Plant and Their Functions

1. If the statement is correct, put (✓); if wrong, put (×):

👉

(a) The color of the root is white or gray.  ✓

(b) The part of a leaf between the base and lamina is called petiole. ✓

(c) Barley is a monocotyledon plant. ✓

(d) The stalk of wheat is solid. ×

(e) The outermost part of the flower is called petal.  ×

2. Fill in the blanks using the words given:

👉

Part of plant	Monocot plant	Dicot plant
Root	fibrous roots	tap root
Stem	hollow	solid stem
Leaf	parallel veins	reticulate veins
Seed	monocotyledonous	dicotyledonous

3.Match the parts of the flower and their names:

👉

Flower Part Description	Name
(a) Colorful and attractive part	F. corolla
(b) Place where the four parts attach	D. thalamus
(c) Male organ	E. androecium
(d) Green part of flower	B. calyx
(e) Female organ	A. gynoecium

4. Write the names of the parts of a leaf from the diagram: Broad part of the leaf 👉 Lamina