In 1977, oceanographers aboard the research submersible Alvin discovered hydrothermal vents along the Galapagos Rift, located deep on the Pacific Ocean floor. To their astonishment, these vents were surrounded by dense, thriving communities of previously unknown marine organisms, including giant tube worms and blind crabs. Unlike terrestrial ecosystems, which rely fundamentally on sunlight and the process of photosynthesis, these deep-sea biological communities existed in complete darkness. They depended instead on chemosynthesis, a biological process in which specialized bacteria convert toxic hydrogen sulfide gas emanating from the vents into organic energy. This historic discovery revolutionized biological science by proving that complex ecological systems could survive entirely without solar radiation.
According to the passage, the discovery of hydrothermal vents was historically significant because it proved which of the following?
- Complex biological communities can exist in the absence of sunlight.Cevap
- BTerrestrial organisms have learned to utilize toxic gases to produce organic energy.
- CDeep-sea bacteria require solar radiation to convert hydrogen sulfide into energy.
- DPhotosynthesis is a more efficient biological process than chemosynthesis.