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If a star is bigger than Sun, but not more than twice as big, it will turn into a
After which one of the following tribes of India, the largest continent of ancient geological history of the world has been named?
Salivation of soil is caused by:
What are the imaginary lines encircling the earth horizontally called?
A wide inlet of the sea usually concave in shape, is termed as a:
Which type of lake is formed by volcanic activities?
Tundra’s are:
A spinning neutron star is known as:
Source of energy in ecosystem is:
A natural region has the similarity of: