1.a single-celled or relatively simple multicellular organism that possesses nuclei and other membrane-bound cell components. Protozoa, algae, and slime molds are protoctists.
1.The centriole lies outside the nucleus of animal cells and many fungal and protoctist cells, but is absent in cells of most higher plants.
中心粒存在于动物细胞和许多真菌及原生生物的细胞核外，但在大多数高等植物中缺失。