Protists are a diverse group of eukaryotes (organisms whose cells possess a nucleus) that are primarily single-celled and microscopic but exhibit a wide variety of shapes and life strategies. They have different life cycles, trophic levels, modes of locomotion, and cellular structures. [4] [5] Although most protists are unicellular, there is a considerable range of multicellularity amongst ...

Leukemia (also spelled leukaemia; pronounced / l uː ˈ k iː m iː ə / [1] loo-KEE-mee-ə) is a group of blood cancers that usually begin in the bone marrow and produce high numbers of abnormal blood cells. [9] These blood cells are not fully developed and are called blasts or leukemia cells. [2] Symptoms may include bleeding and bruising, bone pain, fatigue, fever, and an increased risk of ...