General Science 5th Class Chapter 1 Classification of Living Organisms Solved Exercise

General Science

5th Class

Chapter 1

Classification of Living Organisms

Questions

1. Encircle the correct option.

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

a.         b.         c.         d.

ii. The cat belongs to which group?

a. Amphibians        b. Reptiles        c. Birds        d. Mammals

iii. A fish respires through which organ?

a. Gills        b. Lungs        c. Air sacs        d. Skin

iv. What is the number of cotyledons in a gram seed?

a. One        b. Two        c. Three        d. Four

v. Which group is found only in the ocean?

a. Fish        b. Insects        c. Echinoderms        d. Amphibians

2. Write short answers.

i. Define biodiversity.

Ans.

The number of kinds of living things present at a particular place is called biodiversity.

ii. State the importance of classification.

Ans.

Due to classification, we can determine the similarities and differences among organisms. Due to the structure and other characteristics of organisms, we can identify and study them. We can also know the relationship among organisms.

iii. Write the differences between:

(a) Worms and Insects        (b) Amphibians and Reptiles

Ans.

(a) Worms and Insects

Worms:

(i) Worms are soft bodied animals

(ii) They have no legs

(iii) For example: flatworm and roundworm

Insects:

(i) Insects are segmented body animals with head, thorax and abdomen

(ii) They have (three pairs) six legs

(iii) For example: honeybee and mosquito

 (b) Amphibians and Reptiles

Amphibians:

(i) Amphibians have moist and loose skin.

(ii) They lay eggs in water

(iii) For example: frog and toad

Reptiles:

(i) The skin of reptiles is thick, coarse and dry

(ii) They lay eggs on land

(iii) For example: snake and tortoise

iv. What is the similarity between Fungi and Animals?

Ans.

Animals and fungi do not have chlorophyll in their cells so they can not make their own food and get food from other organisms.

v. Write one characteristic and one example of Monera and Protista

Ans.

Monera: They are made up of single cell and their structure is very simple.

For example: Bacteria

Protista: Protista usually live in water like rivers, ponds, and oceans.

For example: Amoeba

3. Constructed Response Questions:

i. Some animals have internal skeleton of cartilage such as Shark and Sting Ray. They feed on other animals by predation. What is the importance of cartilage in their life?

Ans. Cartilage is more flexible. This help the shark and sting ray in their movement easily in water so that they can easily approach their food sources.

ii. Why does the body of Zebra have black and white stripes?

Ans. The body of every zebra contain specific pattern of black and white stripes for their identification. These strips also help to confuse predators and control animals body heat.

iii. Why are the ears of elephant large?

Ans. Elephant is the biggest animal of land. It has large body size due to this large amount of heat is produce in his body. Large ears help the elephant to maintain its body temperature.

4. Investigate:

i. Investigate the factors responsible for the extinction of biodiversity.

Ans. Factors responsible for the extinction of biodiversity are as follows:

• Deforestation
• Loss of habitat
• Environment pollution
• Over hunting

ii. Give an example of extinct and endangered animals. Investigate what type of animals are most likely to be extinct?

Ans. Dinosaur and Indian Cheetah are extinct animals. Indian Dolphin, Elephant, Rhinoceros, parrots and parrots are endangered animals. The animal whose habitats are lost and over hunting for commercial purposes are most likely to be extinct.

5. Project:

Album of Animals

Material Required:

i. Old newspaper and magazines

ii. Scissors

iii. Gum

iv. Coloured markers

v. Album

a. Cut pictures of two animals from each of the five groups of vertebrates. The pictures can also be obtained from internet:

b. Paste the picture on album:

Ans: Practical Work

c. Write characteristics of each animals with its pictures:

Example:

• It has fins tails.
• Its body has scales.
• Its body is boat-shaped.