Mosquitoes that carry disease-causing organisms from person to person are called
a. pathogens
c. parasites
b. vectors
d. viruses

Which of the following choices is not an effective solution to the energy waste related to inefficient lighting? a. using low-pressure sodium lighting sources b. pointing lights on billboards and street signs upward c. placing light sources on time controls d. shielding light to direct it downward

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?

Describe how a non-resistant staphylococcus aureus bacterium can produce a bacterium that is resistant to methicillin