Jerry prefers to burn bituminous coal in his fireplace because of the yellow flame. what causes that flame color?
a.
low carbon content
b.
high sulfur content
c.
high methane content
d.
softer structure
e.
lower heat value

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