The dutch elm pathogen is spread from an infected elm tree to a healthy tree by1.wind-blown or rain-splashed spores2.root grafts3.both wind-blown/rain-splashed spores and infested elm bark beetles4.both infested elm bark beetles and root grafts5.infested elm bark beetles

Drag each tile to the correct box. the body monitors the levels of oxygen in the blood to regulate breathing. isabel is running in a marathon and is near the finish line. she feels out of breath. how will her nervous system work to generate a reaction? arrange the tiles in chronological order. isabel's breathing rate increases. sensory receptors in the arteries detect low oxygen levels. the brain sends signals through motor neurons. sensory neurons generate an impulse. the central nervous system relays an impulse to certain brain regions.