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?

What are four key elements of the study of economics?

Is citizens were comfortable with their detachment from england and had no interest in going to war

Hydrilla (hydrilla verticillata) is an invasive aquatic plant and one of the most serious aquatic pests in florida. hydrilla has already been introduced to hundreds of bodies of water throughout florida, hydrilla is difficult to control because it grows rapidly and survives in many different water depths and conditions. hydrilla • describe how hydrilla affects native plant and animal species. include both a biotic and an abiotic limiting factor. • suggest one biotic and one abiotic recommendation that could slow the spread of hydrilla