What causes folded mountains to form? collision of a continental plate with an oceanic plate
collision of continental plates
vertical shifting along a fault line
lava emerging from a crack or fissure in the crust

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?

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

2. sketch the inside of the bean nodule, and describe or label what you observed with the hand lens.