"Characteristics and Life Process Of Organisms"

SLO's Topics covered in questions.

Chapter 1 Science Class 4: Questions and Answers PTBB Pakistan

   

 'Response  Questions'


Question:7

A tiger has large canines

A rat has large incisors

(a) What does a tiger do with his canines?

tiger has large canines
tiger has large canines


Ans;

For piercing the food.


(b) What does a rat do with his incisors?

rat has large incisors
rat has large incisors


Ans;

For biting food or killing its prey.


Question:8

How are invertebrates are useful for humans?

Ans;

i- Source of sea food

ii- Honey bees provides honey.

iii- Silk by silkworm.

iv- Pearls in oysters.

Question: 9

What is the importance of biodiversity?

importance of biodiversity?
importance of biodiversity?


Ans;

i-It provides us a variety of food such as fish, meat, vegetables, fruits and cereals etc.

ii-It plays an essential role in medical resources.

iii-It provides industrial materials.


Question:10

What is the importance of flowers?

importance of flowers?
importance of flowers?


Ans;

Fruits and seeds are formed from flowers.