In which type of symbiotic relationship is one organism while another is neither benfitted nor harmed? 1) mutualism 2)predation 3)commensalism 4)parasitism

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

garbage disposal because lysosomes dispose of old cell parts like garbage disposals dispose of old food.