What type of boundary recycles crust into the mantle?

plate boundary

convergent boundary

divergent boundary

transform boundary

What adaptation is apparent in the bodies of the three tortoise species shown in figure 16-2

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?

At which location in earth’s interior does the top density continue to increase as thickness decreases?