A type of small snail is very widespread in japan, and colonies of the snails that are genetically similar have been found very far apart. scientists wondered how the snails could travel such long distances. a recent study1 provides the answer. biologist shinichiro wada fed live snails to birds and found that of the snails were excreted live out the other end. the snails apparently are able to seal their shells shut to keep the digestive fluids from getting in.

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.

What organ is the first to receive nutrients that have been absorbed from the digestive tract?

3differences between bacteria and other 2 cells