Numerical answer
Arrange the following sentences (1-4) in the correct logical order to form a coherent paragraph. Enter your answer as the sequence of numbers, e.g. 2413.
1. As a result, coral reefs, though they occupy less than one percent of the ocean floor, host roughly a quarter of all known marine species.
2. Coral polyps form a mutualistic relationship with microscopic algae called zooxanthellae, which live within their tissues and supply them with the majority of their energy through photosynthesis.
3. This efficient energy exchange allows coral colonies to grow into vast, calcium-carbonate structures capable of supporting an extraordinarily dense and diverse ecosystem.
4. In exchange, the coral provides the algae with a protected environment and compounds needed for photosynthesis, a partnership so productive that reefs can flourish even in nutrient-poor tropical waters.
1. As a result, coral reefs, though they occupy less than one percent of the ocean floor, host roughly a quarter of all known marine species.
2. Coral polyps form a mutualistic relationship with microscopic algae called zooxanthellae, which live within their tissues and supply them with the majority of their energy through photosynthesis.
3. This efficient energy exchange allows coral colonies to grow into vast, calcium-carbonate structures capable of supporting an extraordinarily dense and diverse ecosystem.
4. In exchange, the coral provides the algae with a protected environment and compounds needed for photosynthesis, a partnership so productive that reefs can flourish even in nutrient-poor tropical waters.
Show answer and solution
Answer: 2413
Sentence 2 introduces the coral-algae relationship and its energy benefit. Sentence 4 continues describing the exchange ('In exchange...'), completing the mutualism. Sentence 3 then draws the consequence ('This efficient energy exchange allows...') leading to reef growth. Sentence 1 gives the final result ('As a result...') — the high biodiversity reefs support. The chain of connectors fixes the order 2-4-3-1.
Saved on this device. Sign in or create a free account to keep it on every device.