1831: Where does exchange of gases (O2 and CO2) take place in our lungs ?
(a) Alveoli
(b) Bronchi
(c) Pleura
(d) Trachea
1832: The marine animal called dugong which is vulnerable to extinction is a/an
(a) Shark
(b) Mammal
(c) Amphibian
(d) Bony fish
1833: Though a few (gas-based) industries have already been established good reserves of natural gas in India remain unutilised. This vast resource of natural gas can be used in the production of
(a) fertilizers
(b) carbide
(c) graphite
(d) synthetic petroleum
1834: Which one of the following is not an ASEAN member?
(a) Laos
(b) Cambodia
(c) China
(d) Philippines
1835: Which of the following enters human body through skin:
(a) Tapeworm
(b) Hookworm
(c) Ringworm
(d) Threadworm