why would you need two different star charts for finding constellations in the summer and the winter?

Robert wants to know which fertilizer will work the best for his grass. what can he do to explore this inquiry?

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

How do accessory pigments chlorophyll?