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Source of energy in ecosystem is:
Approximately what is the normal rate of temperature rise with depth from the surface of the Earth to the interior of the Earth?
Which of the following is parasitic food chain
A group of inter-connected islands is known as .
What is the mean temperature of Earth?
Soil factors are otherwise known as:
‘Super nova’ is:
The sphere of living matter together with water, air and soil on the surface of the earth is known as:
How many types of ecological pyramids are present in ecosystem?
Which current is responsible for increase in the temperature of the western Europe?