Class 8 Online Courses

Chapter 9: Class 8 Science Exam Tests

Class 8 Science MCQs - Chapter 9

Respiration and Circulation Quiz Questions and Answers PDF - 7

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Respiration and Circulation Questions & Answers PDF Download: MCQ Quiz 7

MCQ 31: The composition of red blood cells have specialized protein called

A) iron
B) chlorophyll
C) copper
D) silver

MCQ 32: The transport system of blood by special organ heart constitutes

A) circulatory system
B) respiratory system
C) digestion system
D) nervous system

MCQ 33: The life span of red blood cells is

A) 2 months
B) 45 days
C) 4 months
D) 12 days

MCQ 34: Exhaled air is the air which we

A) breath in
B) breath out
C) transport in body
D) use under water

MCQ 35: The division of windpipe is done in two

A) bronchioles
B) alveoli
C) nostril
D) bronchi

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7th Grade Science App (Android & iOS)

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Earth Science App (Android & iOS)