Hydrothermal vents on the ocean floor host thriving communities of organisms in complete darkness. Because these communities exist deep underwater, they cannot rely on photosynthesis for survival. Instead, chemosynthetic bacteria convert toxic chemicals from the vents into nutrients, forming the base of the food web. A variety of unique species [underlined portion].
Given the context of the passage, the writer wants to revise the underlined portion to provide the most specific, concrete detail that supports the claim that these species rely on the chemical energy produced by the bacteria. Which of the following choices best accomplishes this goal?
[underlined portion] = "cluster around these vents"
- nourish themselves by consuming the thick mats of bacteria covering the vent chimneysAnswer
- Bwere first discovered by oceanographers exploring the Pacific Ocean in 1977
- Ccluster around these vents; because they need the energy to survive
- Dare found near the vents, which are located thousands of feet below the surface
Answer
nourish themselves by consuming the thick mats of bacteria covering the vent chimneys
The correct choice provides a specific, concrete detail showing exactly how the species depend on the chemical energy by consuming the bacterial mats.
Step-by-Step Solution
Key Concept
Supporting Claims with Evidence and Details
Estimated Time:1m 0s