A cell is infected by a virus, producing a signaling molecule, which diffuses to neighboring cells and triggers programmed cell death when the cells, in turn, are
infected by the virus. How you would classify this type of signaling?

If you are facing north. turn 90 degrees left. turn 180 degrees right. turn round to reverse your direction. turn 45 degrees left. turn around to reverse your direction. in which direction are you facing now?

Would enjoy a movie about the subject

Which best explains why the number of states in the world increased significantly between 1985 and 1995? the map of southeast asia was redrawn, and new countries were formed. new states were formed when the soviet union collapsed. many african states received independence from their colonizers. communist countries seeking to spread their influence created new satellite states. civil wars in central america fueled the creation of new states.