"Characteristics and Life Process Of Organisms"

SLO's Topics covered in questions.

Chapter 1 Science Class 4: Questions and Answers PTBB Pakistan

Questions:3
Differentiate between vertebrates and invertebrates?

Ans:

Vertebrates
Animals having backbone are called vertebrates.
Example:
           Fish, frog, lizard, pigeon, cat                                                                                                               Invertebrates                                             Animals having no backbone are called Invertebrates.                                               Example:
Cockroach, honeybee, butterfly, starfish, millipede

  Questions:4

Write the types of teeth and their functions?

Ans:

Incisor:
Biting and cutting food
Canine:
Piercing food and tearing food
Premolar:
Chewing and grinding food
Molar:
Chewing and grinding food

Question:5


What function do bones and muscles perform together?

Ans: 

The muscles attached with bones move the body parts.

Question:6
Chapter 1 Science Class 4: Questions 3,4,5,6 PTBB Pakistan


Describe the function of lungs and heart?

Ans:

Lungs:
The function of lungs is to bring air into the body.
Heart:
Heart pumps blood in the body through blood vessels.