Q.51)-The carbon dioxide content in the air that we exhale is about
- 4%
- 8%
- 12%
- 16%
Q.52)-Dinosaurs were
- Mammals that became extinct
- Large herbivorous creatures which gave rise to hippopotamus species
- Egg-laying mammals
- Reptiles that became extinct
Q.53)-The study of extinct animals is called
- Herpetology
- Ornithology
- Geology
- Palaeontology
Q.54)-Which of the following organism is most likely to produce Green Hosue gases such as nitrous oxide and methane
- Fungi
- Earthworm
- Bacteria
- Green plants
Q.55)-Chocolates can be bad for healths because of a high content of
- Cobalt
- Nickel
- Zinc
- Lead
Q.56)-Human kidney disorder is caused by the pollution of
- Cadmium
- Iron
- Cobalt
- Carbon
Q.57)-Which of the following is a biodegradable waste
- Wool
- Polythene bags
- Plastics
- Nylon
Q.58)-Which one of the following is the most sensitive indicator of the health of a community
- Birth rate
- Infant mortality rate
- Death rate
- Maternal mortality rate
Q.59)-The anumal which has become extinct recently in India happens to be
- Golden cat
- Cheetah
- Wooly wolf
- Rhinocreros
Q.60)-Why does fish die in summer season as Compare to winter season Is is because of
- Shortage of food
- Rough and sticky
- Rough and dry
- Large and showy
