Aleech attaches itself to the gums of a crocodile and sucks the crocodile's blood. then, the crocodile opens its jaws so that an egyptian plover bird can kill and eat the leech. the relationship between the crocodile and the egyptian plover is an example of a. parasitism b. commensalism c. mutualism d. 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

Aquaternary consumer species would be expected to have a smaller population than a secondary consumer species. select the best answer from the choices provided t f

What is the most common structure of volcanoes?