Gut bacteria are microorganisms that live in our digestive tract and have a mutualistic relationship with humans. These bacteria obtain nutrients from the digestive system and produce vitamin K for humans. Vitamin K is necessary for blood clotting to heal wounds in humans. Without these gut bacteria would be disrupted in a human? ​​

Which of the following statements is a scientific claim? a. the early solar system had large amounts of water; so, the oldest objects in the solar system should also be abundant in water. b. earth is shaped like a sphere even if not all of the scientific observations related to its shape support this idea. c. the mass of the universe is much greater than current models predict; it is not possible to explain this inconsistency. d. planet earth is abundant in water, but there is no way to scientifically determine from where earth's water originated.