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Which of the following metals contribute to bio magnification problem in the ecosystem?
What is the mean temperature of Earth?
On which of the following date/dates, winter solstice is observed in Northern Hemisphere?
I. 21st December
II. 5th August
III. 10th January
How many types of ecological pyramids are present in ecosystem?
The ocean which touches the Asian and American shores is:
The planet emitting green light is:
What is a strait?
Recharging of water table depends on:
Which one of the following is the example of sedimentary rocks?
Which one of the following pair is INCORRECT with respect to Solstice and Equinox?