Subject :Biology Class : Class 7
Case study : Different organisms have different ways in
which exchange of gases occurs. Different respiratory
organs are skin, lungs, gills and some animals even
respire through tiny holes. Students were asked to
observe the aquarium and identify the method of
breathing in aquatic organisms.
What is required by the organisms to survive
in aquarium for longest possible time?
A Nitrates
B Oxygen
C Sunlight
D Carbon dioxide
Ans 1:
Class : >Class 7
HI