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In astrobiology, the narrow region around a star where the temperature allows liquid water to exist, making life possible, is popularly called what?
AThe habitable zone or Goldilocks zone
BThe expanding Big Bang origin region
CThe unwinding DNA replication fork
DThe chromosomal nucleolar organizer zone
Answer & Solution
Correct answer: A. The habitable zone or Goldilocks zone
1. A planet can support life if it can hold an atmosphere and lies at the right distance from its star.
2. At that distance it is neither too hot nor too cold, so liquid water can exist.
3. This region is the habitable zone, popularly the Goldilocks zone.
4. So the answer is the habitable zone or Goldilocks zone, option A.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 19 Origin and Evolution of Life "Astrobiology/Exobiology", p.288_
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