Kelly is observing a one-celled organism through a microscope. Kelly notices that the cell has a nucleus. Explain how Kelly can tell what kingdom the organism belongs to and what else Kelly can tell about the organism by knowing its kingdom.
Kelly knows that two of the ways scientists tell what kingdom an organism belongs to are whether it is one-celled and whether is has a nucleus. Because this organism is one-celled and has a nucleus, it belongs in the protist kingdom. Because this organism is a protist, Kelly knows that it has other cell parts, but no tissue systems. Kelly also knows that this organism lives in either water or a moist environment, and that it either makes its own food or must get it. Kelly knows this organism may be algae, ameba, or a paramecia.