Practice question

“Generally invade easily” for invasive species in diversity-rich ecosystems. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Diversity can influence ecosystem functioning through complementarity, facilitation, and insurance among species, although the relationship depends on which traits are represented rather than species number alone. The remaining alternatives—“Always fail”, “Quick extinction”, “Enhance native richness”—refer to different states, processes, or scales and therefore do not express the same causal relationship. Biodiversity has complementary components. Richness counts entities, evenness describes their relative abundances, and turnover measures compositional change across space or time; no single index captures all three. The cited framing is therefore most useful when treated as a conditional biological claim, with assumptions about scale and environmental context kept explicit. Linking the wording to measurable consequences for fitness, abundance, or flux gives the conclusion its scientific meaning and prevents a purely mnemonic interpretation.