Sample Material of Our Online Coaching Programme
(MCQ) General Science: The Respiratory System
1. Consider the following statements.
(i) Sponges & Jelly fish lack specialised organ
for gas exchange, so they take gases directly from water.
(ii) Flatworms & annelid use thin wall blood
vessels known as capillaries.
(iii) Earthworms use their outer surfaces to
exchange gas.
Which of the above are correct?
- i only
- ii & iii only
- i & iii only
- iii only