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