Which of these pieces of safety equipment should be worn when operating a chainsaw

Which of the following human diseases is caused by a virus that requires reverse transcriptase to transcribe its genome inside the host cell? a) herpesb) aidsc) smallpoxd) influenza

Felicia has a respiratory infection and has been coughing up a lot of mucus. she knows this means that her respiratory system is working to restore balance by getting rid of the invasive materials from her lungs. how does this happen?

Waste is deposited into in thin layers which are then compacted and covered with soil.