Opportunity costs exist because
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Which among the following have a perfect pair of sex chromosomes?
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What genes are mutated to cause cancer?
Chemical composition of cement is
Melghat Tiger Reserve is in which state?
Where is the world's highest volcanic mountain Cotopaxi located?
__________ is the 2016 Oscar Winner for Best Director.
The ratio of the ages of man and his wife is 4:3. After 4 years, the ration will be 9:7. If at the time of marriage, the ratio was 5:3, how many years agowere they married?