How is stratigraphy in determining the age of the earth

Providing immunity by injecting the body with a weakened form a pathogen is known as

What do science, technology, and disease have to do with each other?

Legumes, a type of plant, require rhizobia, a type of soil bacteria, to survive since these organisms fix nitrogen during photosynthesis. rhizobia use the legumes for food. what would most likely happen to the legume population if rhizobia suddenly became extinct?