Which trophic level has the greatest biomass

Which flexible structure that supports the nerve cord and led to the backbone

Which of the following matches the organisms described with the correct domain? a. bacteria--unicellular, eukaryotic organisms with cell walls that do not contain peptidoglycanb. archaea--multicellular, eukaryotic organisms that do not have cell wallsc. eukarya--single-celled and multicellular organisms, with a defined nucleus and a variety of nutritional sourcesd. bacteria--unicellular, eukaryotic organisms that always lack cell walls

Why is the statement not a hypothesis? sunflowers require soil and plenty of sunlight and water to grow and thrive.