BLG 144 Chapter Notes - Chapter 29: Plant, Alveolate, Red Algae
27 Dec 2017
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Paraphyletic represent some, but not all, of the descendants of a single common ancestor. Protists do not make up a monophyletic group (descended from a common evolutionary ancestor) Protists all eukaryotes that are not land plants, fungi, or animals. protists are a paraphyletic grouping that includes all eukaryotes except the land plants, fungi, and animals. Biologists study them because they are important medically, ecologically, and evolutionarily key morphological innovations occurred at protists diversified: the nuclear envelop, multicellularity, and an array of structures that function in support and protection. In addition, the mitochondrion and chloroplast arose by endosymbiosis protists vary widely in terms of how they obtain food. Many species are photosynthetic, while others obtain carbon compounds by ingesting food or parasitizing other organisms protists vary widely in terms of how they reproduce. Sexual reproduction evolved in protists, and many protist species can reproduce both sexually and asexually. Eukaryotes vary from single-celled organisms (bacteria) to blue whales.
