Evidence 1 :- A plant's seed whose pod can float in water for months, lies dormant for years until conditions that are just right precipitate germination. To a scientist, it is evidence of survival strategy. A plant can colonise a new area far away from its original base.
Evidence 2 :- A bacterium or other organism can withstand being frozen in a vacuum indefinitely until jolted back into life when it hits, say a planet. To a scientist this is irrelevant detail and doesn't indicate that certain bacteria have evolved this feature so they can go planet-hopping when major collisions happen.