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 are the necessary conditions for the growth of coral reefs?
1) Photic conditions
2) Clean and sediment free water
3) Sea salinity of 6%
4) Tropical sea water with temperature of 20°C to 21°C
Select the correct answer using the code given below:
1, 2 and 4 only
2 and 4 only
1 and 3 only
1, 2, 3 and 4
Which one of the following diseases is caused by Cadmium pollution?
Minamata
Itai-itai
Fluorosis
Blue baby syndrome
Presence of ozone in the atmosphere is important because it absorbs
ultraviolet-A and ultraviolet-B radiations
ultraviolet-B radiations only
infrared-B radiations only
outgoing ultraviolet-B radiations and incoming ultraviolet-A radiations
NPP (Net Primary Productivity) is highest for
tropical forests
swamps
reefs
woodland and shrub land
Study of a single species and the environmental factors in its habitat is called
Genecology
Synecology
Autecology
Ethology
