Q.

What does the term 'Panspermia' refer to?

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a

Decaying and rotting matter

b

Sperm of extinct organisms

c

Broth containing killed yeast 

d

Spores from extraterrestrial space

answer is B.

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Detailed Solution

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The panspermia theory suggests that spores may have come from outer space and travelled to Earth on meteorites, asteroids, or comets. They would have given rise to life forms on Earth eventually. 

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