What is the relationship between a mutation and a gene?

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?

What is the name of the type of cell division that occurs in the prokaryotic cell cycle

Why is it incorrect to say that mitochondria function only as energy factories with cell