Afreshwater is a type of ecosystem. grasses, fish, wading birds, frogs, and alligators live together in fresh water marshes. pieces of decaying material sink to the bottom of the marsh. in which of these places can carbon be found in the marsh?

15 ! come and answer! a(n) disease is caused by a pathogen and can spread among organisms. a infectious b noninfectious c toxic d contaminated

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes

The activity of the modern sample is 1.10 bq . how long does that measurement take?