This is the idea that pre-biological changes slowly transformed simple atoms and molecules into the more complex chemicals needed to produce life. This theory suggests that life originated on Earth by means of the slow evolution of nonliving matter.

Describe how an electric generator works

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?

Hurry which of these is true about index fossils? a) are very scarcely found b) used as guides in relative dating c) found in the youngest layer of the rock d) used as reference points in absolute dating