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1. What stage occupies the vast majority (approximately 90%) of a star's lifetime, during which it generates energy by fusing hydrogen into helium in its core?
2. A conserved copper-binding gene cluster has been identified in which type of organisms?
3. On the modern periodic table, elements are primarily arranged according to their:
4. Who was the first person known to use a telescope for systematic astronomical observations, leading to discoveries that supported the heliocentric model?
5. Which subatomic particle carries a negative electrical charge and is typically found orbiting the nucleus of an atom?
6. What celestial objects are known to produce powerful relativistic jets?
7. Which of the following is Earth's outermost solid layer?
8. What numerical scale is primarily used to indicate the acidity or alkalinity of a solution?
9. The R package MultiModalGraphics is designed primarily for which type of data processing?
10. A substance that cannot be broken down into simpler chemical substances by ordinary chemical means is known as a(n):
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