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Tropical rain forest is characterised by:
Which one of the following is the correct sequence of ecosystem in the order of decreasing productivity?
5. The light from the Sun reaches the Earth in about—
As one moves from the polar region towards equator the diversity of plant and animal species .
As the river enters the plain it twists and turns forming large bends known as .
Who had used the term “Ecology” first time?
The well through which water comes out through hydraulic pressure is called:
The ocean which touches the Asian and American shores is:
What is the process of seeping of water into the ground called?
Which of the following phenomena is supposedly associated with global warming?