Water saturation of soil that fills all air spaces and causes plant roots to die?

Most pathogens of the human body would be classified as 

This is a chemical that kills fungi specifically?

In this relationship the effect on one species is positive (+) and the effect on the other species is also positive (+)?

This habitat is characterized by low moisture levels, wide daily temperature fluctuations, and most animals are nocturnal and conserve water?

This is a testable statement in science?

This is the ethical value that things have an intrinsic right to exist?

This is a treeless landscape that occurs at high latitudes or on mountain tops

This subatomic particle has a negative charge?

These are bays or semi-enclosed bodies of brackish water that form where rivers enter the ocean?