Class 5 General Science (G.Sc.) Notes: - Unit-1: Classification of Living Organisms: Solved Exercise ( MCQs, Questions and Answers)

General Science (G.Sc.) Class 5 Notes

Based on the Single National Curriculum, PK

(New Book/New Syllabus for 2023-2024 Exams and onward)

National Book Foundation
as
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"1. Tick ( ✓ ) the Correct Answers"

i. Which one of the following is the foot of an aquatic bird :

 

... Answer is   

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ii. To which group does the cat belongs?

(a) amphibian
(b) reptiles
(c) birds
(d) mammals

... Answer is (d)  mammals
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iii. Which organ does a fish use to respire?

(a) gills
(b) lungs
(c) air sac
(d) skin

... Answer is (a) gills
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v. Which group is found only in the ocean?

(a) fish
(b) insects
(c) echinoderms
(d) amphibian

... Answer is (c) echinoderms
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2. "Write Short Answers"

Q(i). Define biodiversity? 

Ans: Biodiversity: The different kinds of organisms found in any particular area are called biodiversity.

Q(ii). State the importance of Classification.

Ans: Classification: The arrangement of organisms into different groups on the basis of similarities and differences is called classification. 

Importance of Classification: 

1. It provides us a good picture of all living things. 

2. It gives us information about the interrelationships among different organisms.

3. It helps to identify newly discovered organisms. 

Q(iii).  Write the differences between:

Ans:

(a) Insects and  Worms

Insects:	Worms:
1. Insects have a hard external Structure which is called exoskeleton.	1. Worms are soft body animals.
2. They have a segmented body.	2. They have a round and cylindrical body.
3. They have six or three pairs of legs.	3. They have no legs.
Examples: Honey bee, Mosquito	Example: Earthworm, Flatworm

(b) Amphibians and Reptiles 

Amphibian:	Reptiles:
1. They have moist skin.	1. They have thick coarse and dry skin.
2. They respire through the lungs and skin.	2. They respire through the lungs.
3. They lay eggs in water	3. They lay eggs on land.
Example: Frog, Toad.	Example: Snake, Lizard

Q(iv).  What is the similarity between fungi and animals?

Ans: 

i. Both fungi and animals are without chlorophyll.

ii. Both cannot prepare their own food and use external food sources for energy. 

Q(v). Write one characteristic and one example of Monera and Protista.

Ans: 

Monera:

These organisms are made of one cell. Their structure is also very simple.

Example: Bacteria

Protista:

Protista is organisms that mostly live in water. They are mostly unicellular but some are multicellular.

Examples: Amoeba, Algae

3. "Constructed Response Question"

Q(i).  Some animals have internal skeletons of cartilage such as sharks and Sting rays. They feed on other animals by predation. What is the importance of cartilage in their life? 

Ans: Sharks and Sting Ray have skeletons made of flexible cartilage instead of bones. The flexibility of cartilage allows them to move quickly in water and it also helps them to make tight turns quickly throughout the water. 

(ii) Why do zebras have black and white stripes?

Ans: The basic idea is that black stripes would absorb heat in the morning and warm zebras whereas white stripes reflect light more and could thus help cool. zebras in the blazing sun.

(iii) Why do elephants have large ears? 

Ans: Thousands of blood vessels make up the animal's ears. These vessels allow the excess body heat to escape the elephant's body and regulate its body temperature. Their big ears are also used as fans to cool off their bodies. 

4. "Investigate"

Q.1 Investigate the factors responsible for the extinction of biodiversity.

Ans: The following are some factors that are responsible for the extinction of biodiversity 

(i) Pollution (ii) habitat loss (iii) introduction of invasive Species (iv) Overexploitation of preferred species (v) climate change (vi) natural disaster change 

Q2. Give an example of extinct and endangered animals. Investigate which animals are most likely to be extinct in the near future.

Ans:

Extinct animals: 

The type of animals which no longer found in this world are called extinct animals.

Examples: dinosaurs, and Tasmanian tigers.

Endangered animals: 

Many animals that are very likely to become extinct in the near future are called endangered animals 

Example: Snow leopard, green turtle, markhor 

Some animals which are most likely to be extinct in the near future are:

(i) Sumatran Tiger

(ii) Saola 

(iii) Hawksbill turtle 

(iv) Precious Steam - Toad 

(v) Red wolf 

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4.  5th Class: Urdu (اُردو) Notes

5.  5th Class: Islamiyat (اسلامیات) Notes

6.  5th Class: Mathematics Notes

7.  Easy English Grammar Notes

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