BIO SCI 94 Lecture Notes - Lecture 10: Heterotroph, Giant Tube Worm, Chemotroph

• School: UC-Irvine
• Department: Biological Sciences
• Course: BIO SCI 94
• Professor: Brandon Stuart Gaut

Document Summary

Lecture (cid:1005)(cid:1004): protists & the evolution of eukaryotic. Archaebacteria were limited to extreme environments, but recent research has shown that is not the case: thermophiles: archaebacteria that are adapted to high heat environments, heterotrophs, need a source of organic compounds, photoheterotrophs. *from textbook: don"t have a nucleus, have circular chromosomes, don"t have organelles enclosed by membranes, bacteria have peptidoglycan but neither archaea nor eukarya have it. Bacteria and archaea are haploid, and eukaryotes are diploid (usually). On the phylogenetic tree below, which number indicates the likeliest point for the evolution of diploidy: 1, 2, 3, 4, 5. Sexual reproduction is seen in eukaryotes, but not in prokaryotes. On the phylogenetic tree, which number indicates the likeliest point for the evolution of sexual reproduction: 1, 2, 3, 4, 5. Protists: protist refers to most of the eukaryotes, w/ the exception of plants, animals, & fungi, not a monophyletic or natural group, classification of protists is changing rapidly.