Which boundary type adds to the lithorshpere ( the hard outer crust of the earth)

After getting the slide and microscope ready, stella is eager to see the microscopic pond water specimen! she crouches around her microscope and aligns her eye with the microscope’s eyepiece. but she's only able to see a bright white light. at this point, no specimens or cells are visible on stella's pond water slide. after taking a moment to collect her thoughts, stella realizes she can't see any lifeforms because .

How does a gymnosperm prevent itself from pollinating the same tree

Ecology can best be described as the study of what