What symbiotic relationship forms lichens?

What would be an example of hypothesis for goldfish respiration lab

What are the most explosive events that occur on the sun? umbras solar flares solar winds prominences

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism