Paper burns by combining with oxygen. why doesnt paper burn every time it contacts oxygen

Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria

How do disease caused by bacteria and disease caused by viruses react to antibiotics?

Consider this microscopic image of bacteria, which bacterial form is shown in the image?