Why do very few trees exist in a grassland ecosystem?
a. not enough heat
b. not enough topsoil
c. not enough sunlight
d. not enough precipitation?

Which statement best explains why cells were observed in more detail using a compound microscope than a simple microscope? a compound microscope has greater magnification ability than a simple microscope. the compound microscope was invented before the simple microscope. a compound microscope is much easier to manufacture than a simple microscope. compound microscopes were more common than simple microscopes.