In 1977, oceanographers exploring the Galapagos Rift made a startling discovery that upended biological orthodoxy. Utilizing the submersible Alvin, scientists observed dense communities of giant tube worms, clams, and crabs thriving around hydrothermal vents in the deep ocean, thousands of meters below the sunlit surface. Previously, biologists assumed that all marine ecosystems depended ultimately on photosynthesis powered by sunlight. However, these abyssal organisms thrived in complete darkness by utilizing chemosynthesis. In this process, specialized bacteria oxidize toxic hydrogen sulfide emitting from the vents, converting chemical energy into organic matter. This finding proved that complex life could flourish entirely independent of solar energy, revealing an alternative metabolic foundation for terrestrial and extraterrestrial ecosystems alike.
The passage indicates that the specialized bacteria surrounding hydrothermal vents generate organic matter by doing which of the following?
- AUtilizing sunlight to neutralize the toxic effects of hydrogen sulfide emissions.
- Chemically transforming the poisonous hydrogen sulfide released by the vents.Cevap
- CDirectly absorbing chemical energy that has already been converted by the vents.
- DTransferring organic matter from the sunlit ocean surface down to the abyssal depths.