What are specific and nonspecific defenses used to rid the body against pathogens

What adaptations can prey use to avoid predation

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

Choose the diagram that best represents a habitat corridor explain your choice.