1 .
Among the biotic components of the ecosystem, the producer system is ?
A .
Sea
B .
Rivers
C .
Green Plants
D .
Animals
View Answer
- C . Green Plants
2 .
Which of has following group of gases contribute to the 'Green House Effect' ?
A .
Carbon tetrafluoride and Nitrous oxide
B .
Carbon monoxide and Sulphur dioxide
C .
Ammonia and Ozone
D .
Carbon dioxide and Methane
- View Answer
- D . Carbon dioxide and Methane
3 .
Which one of the following disease is not transmitted by tiger mosquitoes ?
A .
Dengue
B .
Chikungunya
C .
Japanese Encephalitis
D .
Yellow fever
- View Answer
- C . Japanese Encephalitis
4 .
Which one of the following air pollution can affect blood stream leading to death ?
A .
Cadmium
B .
Asbestos dust
C .
Carbon monodioxide
D .
Lead
- View Answer
- C . Carbon monodioxide
5 .
What is Pollination ?
A .
germination of pollen grains
B .
growth of pollen tube in ovule
C .
transfer of pollen from anther to stigma
D .
visiting flowers by insects
- View Answer
- C . transfer of pollen from anther to stigma