Cells can become large, but can't a single big cell also escape a filter predator that's also a single big cell? There needs to be some reason for why in most cases, both are multicellular.
From a mechanics of materials perspective, having a larger size also means being easier to break. Multicellularity seems to be a way to have preferred breaking points that are cheaper and easier for the organism to repair.
but can't a single big cell also escape a filter predator that's also a single big cell
Maybe if it's big enough, but there's a huge cost to being big and the cot is harder to bear for more herbivorous cells. For most organisms the better survival strategy is probably to be more numerous and accept a certain level of attrition, hence ants outnumbering humans.
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Cells can become large, but can't a single big cell also escape a filter predator that's also a single big cell? There needs to be some reason for why in most cases, both are multicellular.
From a mechanics of materials perspective, having a larger size also means being easier to break. Multicellularity seems to be a way to have preferred breaking points that are cheaper and easier for the organism to repair.
Maybe if it's big enough, but there's a huge cost to being big and the cot is harder to bear for more herbivorous cells. For most organisms the better survival strategy is probably to be more numerous and accept a certain level of attrition, hence ants outnumbering humans.