In most birds air sacs are ____________ in number?

Related Mcqs:

1. Vacuoles are fluid filled sacs surrounded by a membrane called__________?

   A. tonoplast B. nuclear membrane C. cell membrane D. cell wall Submitted by: Muhammad Nawaz...

2. Gaseous exchange in birds occurs at level of_______________?

   A. Alveoli B. Air sacs C. Bronchi D. Parabronchi...

3. Adult birds normally possess only one functional____________?

   A. Ureter B. Ovary C. Lung D. Testis...

4. Bats & humming birds belong to___________?

   A. Endotherms B. Ectotherms C. Heterotherms D. Homeotherms...

5. Which of the following animals has a respiratory system with one way flow of the air through the lungs, and the air is renewed after inspiration?

   A. Cockroach B. Earthworm C. Aves D. Frogs...

6. Air contains __________ % of CO2 ?

   A. 0.02-0.03 B. 0.03-0.04 C. 0.04-0.05 D. 0.05-0.06...

7. Oxygen contents per liter of air is____________?

   A. 10 ml B. 100 ml C. 200 ml D. 100ml...

8. Water is _________ times viscous than air?

   A. 50 B. 1000 C. 5000 D. 8000...

9. The air spaces may comprise upto _________ of total volume of leaf surface?

   A. 30% B. 20% C. 40% D. 50%...

10. Joints between flat bones of skull are termed as ____________ ?

    A. Suture B. Sutural joints C. Syndesmosis D. Both A and B Submitted by: Rashid Mehmood...