Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
Which of the following chemicals is responsible for ozone layer destruction?
Chlorofluorocarbons
Halogens
Hydrofluorocarbons
All of the above
Why plants are killed in winter by frost?
No transpiration occurs at such low temperature.
There is desiccation and mechanical damage to the tissues.
No photosynthesis takes place at such low temperature.
Respiration ceases at such low temperature.
Which of the following is not a component of chlorophyll?
Calcium
Carbon
Hydrogen
Magnesium
Uric acid is a chief nitrogenous waste of which of the following?
Human
Frogs
Fishes
Birds
Which is the largest living bird?
Emperor Penguin
Brown Kiwi
Ostrich
Greater Rhea
