BIOL 119 Chapter Notes - Chapter 30: Nuclear Membrane, Harmful Algal Bloom, Symbiogenesis
Document Summary
Eukaryotes are the largest and most morphologically complex organisms on the tree of life. Nuclear envelope- synapomorphy of eukarya: synapomorphy- a shared, derived trait that distinguishes major monophyletic groups. Medically important, ecologically important, critical to understanding the evolution of plants, fungi, and animals. Irish potato famine was caused by a protist- p. infestans. During a bloom, high levels of toxins can buildup in the flesh of these shellfish. If a person eats a contaminated shellfish, several types of poisoning can result. Light microscopy allowed biologists to identify and name many protist species. Evaluating molecular phylogenies & discovering new lineages. 3: amoebozoa and opisthokonta (include fungi and animals), form a monophyletic group- unikonta, the other 5 lineages form a monophyletic group- bikonta. Direct sequencing- based on sampling soil or water, analyzing the dna sequence of specific genes in the sample, and using the data to place organisms on a phylogenetic tree.
