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Which U.S. stock exchange contains more than 3,000 technology stocks?
Predation
One species captures, kills, and eats another.
Parasitism
Relationship in which one species withdraws nutrients from another species, without immediately killing it.
Species Richness
Of a community, the number of species.
Different Species
Distinct groups of living organisms that have evolved independently and can reproduce fertile offspring only within their own group.
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