Mycorrhizal Fungi and Plant Roots: A Symbiotic Relationship
Mycorrizal fungi help plant roots absorb nutrients and fight off harmful, soil-dwelling predators. In exchange, the fungus receives sugars and nutrients from its host plant.
Lichens from Antarctica survived 34 days in a laboratory setting designed to simulate the environment on Mars.
Photo by Fotolia/Ifrabanedo
The prevailing opinion among experts is that when you’re looking through a microscope at mitochondria, you’re looking at highly modified bacteria whose ancestor formed a symbiosis with a larger, single-celled creature eons ago.