BIOS 10161 Lecture Notes - Lecture 1: Eukaryote, Homo Sapiens, Ecotourism
6 Sep 2016
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Document Summary
Biology- scientific study of living things: everything descended from common origin 4 billion years ago, seen in similarities in gene sequences, genetic code, amino acids shows importance of evolution. Evolution- central theme of bio: living things evolve through differential survival and reproduction. Unicellular & multicellular organisms exist: unicellular examples- archae, e. coli, protists, multicellular examples- plant, fungus, animals. Earth formed 4. 6-6. 5 billion years ago: formed 600 million years or more before life arose. Complex bio molecules probably arose through random physical associations of chemicals: nucleic acids forming was essential. Molecules that could reproduce themselves and serve as templates for synthesis of proteins: dna = life"s blueprint, dna nucleotide sequences make genes --- can transcribed and translated to make proteins. Membranes important evolutionary step: created internal environment in which rxns can be controlled and integrated, prokaryotic cells one simple membrane, eukaryotic multiple membranes.
